Precious gems

Aquamarine

Aquamarine

NameAquamarine
Weight (ct)131.04
Colorblue
Shaperectangular
Dimensions (LxWxH)38.60x27.02x17.53
OriginSanta Maria (Brasil)

An aquamarine like this does not only have a rare size but it also exhibits a color that is only found in resources of Brazil (Santa Maria old mine) and Mozambique (Santa Maria Africana). This stone is a typical Santa-Maria-Africana stone with the term "Africana" being obsolete after the CIBJO-convention as origin is not determinable for value and a color like this one is an own term – just Santa Maria. Whenever needed in future the easiest way to distinguish it from other deep-colored aquamarines is its pleochroism under a dichroscope – you will see a deep ink-like blue next to a faint blue which is remarkable and unique for Mozambique. Sizes like these have not been mined in Mozambique for the last 10 years, only old stocks still have these sizes. Its weight is not too heavy to wear it as a necklace nor is its color too unique not to be combined with different colors or even some deep-colored quartzes and minor set-stones. As its shape is an emerald-cut, its light can be perfectly totally reflected inside and show the best of the stone´s color. So with this stone you attain a center-stone for every set (just think about the Levi's blue jeans which everyone can wear with any kind of T-shirt!). Its sizes are 38.60x27.02x17.53, the unusual weight is 131.04 ct. in an rectangular-cut with a polish that only in Idar-Oberstein can be reached. The last point to mention is that the weight of this stone is way enough that in future this stone can be recut to a special form and shape to make it attractive for future generations!

Mandarin Garnet

Mandarin Garnet

NameMandarin Garnet
Weight (ct)14.21
Colororange
Shapeantique
Dimensions (LxWxH)13.9x13.9x9.5

This mandarin garnet is of a size, weight and clarity that have only been found in central Africa about twenty years ago. Right now no mandarin garnets are mined at all, only a few stocks where we have access to still have an amount and keep parts of them for themselves. To compare it with spessartine you need to delineate the brown touch which is not observable in this stone. It is pure fire of orange. As a garnet it has complicated absorption spectra and each type of garnet therefore exhibits unique chemical and physical characteristics. It cannot be synthesized and also the small natural „fingerprints“ in it will make this stone a worthwhile investment as many people look for it at all times. There was one stone of equal size on the last Intergem-fair in Munich and directly sold – this one is incomparable and only few exist on public market places. Its diameter is 13.9 mm and height is 9.5 mm. Its weight amounts to 14.21 cts. and the color is not able to be copied by citrine or other stones. Its shape is antique, which is a rarely cut fantasy type. There are only a few cutters in the world that would take the risk to cut such material in an unusual shape unless they do it very often. In the future the flair of antiquity will prevail and therefore the combination of the type of cut, extremely rare material and weight will be a good investment for the future.

Morganite

Morganite

NameMorganite
Weight (ct)129.82
Colorrose
Shapehalf-mood/triangle
Dimensions (LxWxH)38.68x31.24

Amongst the beryls two colors are of exceptional rarity: The red and the soft rose color. Occurring mostly in pegmatites with high manganese content those deposits are scarcely yielding beryls of high quality as most of the manganese is worked in ore and surrounding material and only at the end forming morganites of this unique chemistry. Beryls form at the end of magmatic processes, so the probability that enough manganese is left over for beryls is small, but even smaller is the probability that a clean, big morganite with just the right amount of inclusions develops. Most pinkish beryls from Africa or Brazil will be small and have no intense colors. It was tried to treat beryls to gain the morganite color but attempts failed to gain the intense colors like this stone has. This stone shows small inclusions which lets it always appear natural in the future. The half-moon shape is quiet unusual in the trade and it was very brave to be gained from a rough material of a major size and quality. The half-moon cut is 38.68 mm long and 31.24 mm high.

Tourmaline (Paraiba)

Tourmaline (Paraiba)

NameTourmaline (Paraiba)
Weight (ct)87.52
Colorblue
Shaperound
Dimensions (LxWxH)28.52
OriginMozambique

This swimming-pool blue Tourmaline of 20.85 carats shows a distinct turquoise-blue color which is very typical and worldwide recognized as being a Paraiba tourmaline. Usually tourmalines are cut where they show their most intense color, which is parallel to the c-axis. To cut a large table a big stone is necessary and to take as much stone as possible from a good rough a triangle shape is worthwhile due to the trigonal crystal system of tourmaline. The weight of 87.52 cts. is very rare for this color because most copper and manganese colored purple or bluish tourmalines are found in rare areas in Brazil, Mozambique and Nigeria. Rarely from Africa, Mozambique, come big purple tourmalines and if the chemistry fits they are heated to yield the swimming-pool blue Paraiba tourmalines. The combination of transparency, size and intensity of color makes this Paraiba Tourmaline an interesting investment. A color like this with these inclusions and chemistry cannot be synthesized nor obtained via irradiation. Therefore not only the certificate by DSEF and SSEF stands for naturalness and rarity of the stone but also visible inclusions (so called „trichites“) are a natural remnant visible under the microscope. Any other stone imitating this like naturalness apatites will never gain the myth of a “Paraiba Tourmaline”.

Purple Tourmaline

Purple Tourmaline

NamePurple Tourmaline
Weight (ct)26.28
Colorpurple
Shapepear
Dimensions (LxWxH)23.1x15.3x13.1

This purple Tourmaline of 26.28 carats is unheated and shows a distinct deep-purple color. Its size is 23.1 x 15.3 millimeters with a height of 13.1 mm and its pear shape cut is rarely found in tourmalines. Usually tourmalines are cut where they show their most intense color, which is parallel to the c-axis. To cut a large table a big stone is necessary and to take as much stone as possible from a good rough a triangle shape is worthwhile due to the trigonal crystal system of tourmaline. With a pear shape the original rough must have been large but most of its flaws have been cut away, so not a triangle but a pear shape evolved. The weight of 26.28 cts. is very rare for this color because most manganese colored tourmalines are found in pegmatites with smaller rocks and debris. Today resources are the USA (California) and Pakistan/Afghanistan. Rarely from Africa come big purple tourmalines, from Mozambique and if the chemistry fits they are heated to yield the swimming-pool blue Paraiba tourmalines. As this stone is the precursor of such a Paraiba tourmaline, it can still be heated afterwards or left as it is, unheated natural purple-colored. Some bicolor green-purple tourmalines derive from pegmatites in Africa but are of cabochon quality. The combination of transparency, size and intensity of color makes this purple tourmaline an interesting investment. A color like this with these inclusions and chemistry cannot be synthesized nor received via irradiation. Therefore not only the certificate by DSEF and SSEF stands for naturalness and rarity of the stone but also visible inclusions (so called „trichites“) are a natural remnant visible under the microscope. In any case this stone could be heated and would receive a bright blue color but it has more value unheated in the future because it stands out uniquely in the gem trade. An amethyst is not able to imitate its color because of different refractive indices and different dispersion values so this sought-after color will remain important in the long future.

Rubellite (pair)

Rubellite (pair)

NameRubellite (pair)
Weight (ct)2x31.38
Colorpinkish-red
Shapepear
Dimensions (LxWxH)17.50x14.80

This pair of equally pear-shaped tourmalines amounts to 31.28 carats and shows a distinct deep-red color. To find two equally colored, clean tourmalines or one tourmaline out of which two stones instead of one are cut is happening extremely rarely. Also the cut of each of the tourmalines is identical, their dimensions are the same so earrings or likewise jewelry can be crafted out of them. Usually tourmalines are cut where they show their most intense color, which is parallel to the c-axis. To cut a large table a big stone is necessary and to take as much stone as possible from a good rough a triangle shape is worthwhile due to the trigonal crystal system of tourmaline. With a pear shape the original rough must have been large but most of its flaws have been cut away, so not a triangle but a pear shape evolved. The weight of 31.28 cts. is very rare for this color because most manganese colored tourmalines are found in pegmatites with smaller rocks and debris. Today resources are the USA (California) and Pakistan/Afghanistan. Rarely from Africa comes good red material but not in these sizes and color intensity. Regarding the high demand for rubellites it is questionable whether anything will be offered on the market in this quality in the future. The combination of transparency, size, intensity of color and the same shape as a pair makes these red tourmalines an interesting investment. A color like this with these inclusions and chemistry cannot be synthesized. Therefore not only the certificate by DSEF and SSEF stands for naturalness and rarity of the stone but also visible inclusions (so called „trichites“) are a natural remnant visible under the microscope.

Tanzanite

Tanzanite

NameTanzanite
Weight (ct)11.72
Colorblue
Shapeoval
Dimensions (LxWxH)14.6x12.2x9.4

This tanzanite has a bright blue color and a large size. The clarity is high enough for it being outstanding but still maintains enough inclusions so that it will always be recognized as a natural stone. It was cut in an oval shape and its dimensions are 14.6 mm in length, 12.2 mm in maximum width and 9.4 mm in height. It was heated to eliminate its brownish tint and competes among the most bluish stones in the world. An old deposit in Africa which was mined by people from Idar-Oberstein yielded such intense blue tanzanites. After the tanzanite foundation dissolved the grading statutes were kept so in grading tanzanites (look for labs doing this) this stone receives the best grading “triple A”, meaning excellent color, shape and eye clarity and the best color grading “IB” standing for intense blue.

Tsavorite

Tsavorite

NameTsavorite

Tsavorites have always been stones of the Tsars, adventurers and people who love minerals. The tsavorite belongs to the rarest garnets compared to other gemstones and the garnet-mineral group itself. With the best qualities coming from only few localities in Russia and Africa this variety of grossular garnet is always sought after. Stones over three carats are hard to get but stones over five carats are unique. This tsavorite shows us its best intensity of color, not too faded and not too strong, ideal for setting and keeping it a whole lifetime. Garnets are only synthesized for technical purposes and the tsavorite is easy to be detected as a natural stone via its microscopic inclusion picture and chemistry. Therefore it is a smart investment stone; its size, natural inclusions and rarity worldwide always keep it a stable rare piece. Most deposits are empty now, even sources of other garnets, not only tsavorites.

Pink Tourmaline

Pink Tourmaline

NamePink Tourmaline
Weight (ct)20.85
Colorpink
Shapepear
Dimensions (LxWxH)20.7x15.6x11.3

This pink Tourmaline of 20.85 carats is unheated and shows a distinct deep-pink color. Its size is 20.7 x 15.6 millimeters with a height of 11.3 mm and its pear shape cut is rarely found in tourmalines. Usually tourmalines are cut where they show their most intense color, which is parallel to the c-axis. To cut a large table a big stone is necessary and to take as much stone as possible from a good rough a triangle shape is worthwhile due to the trigonal crystal system of tourmaline. With a pear shape the original rough must have been large but most of its flaws have been cut away, so not a triangle but a pear shape evolved. The weight of 20.85 cts. is very rare for this color because most manganese colored tourmalines are found in pegmatites with smaller rocks and debris. Today resources are the USA (California) and Pakistan/Afghanistan. Some bicolor green-purple tourmalines derive from pegmatites in Africa but are of cabochon-quality. Rarely from Africa come big purple tourmalines, from Mozambique and if the chemistry fits they are heated to yield the swimming-pool blue Paraiba tourmalines. As this stone is the precursor of such a Paraiba tourmaline, it can still be heated afterwards or left as it is, unheated natural pink-colored. The combination of transparency, size and intensity of color makes this pink tourmaline an interesting investment. A color like this with these inclusions and chemistry cannot be synthesized nor received via irradiation. Therefore not only the certificate by DSEF and SSEF stands for naturalness and rarity of the stone but also visible inclusions (so called „trichites“) are a natural remnant visible under the microscope. In any case this stone could be heated and would receive a bright blue color but it has more value unheated in the future because it stands out uniquely in the gem-trade. An amethyst is not able to imitate its color because of different refractive indices and different dispersion values so this sought-after color will remain important in the long future.

Tourmaline

Tourmaline

NameTourmaline
Weight (ct)44.49
Colorgreen-blue
Shapeemerald
Dimensions (LxWxH)23.54x15.70

The green color is usually caused by iron and so is the observable bluish tint in this green stone. It is always something special when a tourmaline is blue, big and clear. It would be extremely high priced because sadly… there are none on the market. A good and inexpensive alternative is a green to blue tourmaline like this one as it suits several tastes and can be combined with different sets of stones (green, blue and mixed colors). This specifically is rare. This stone is clearer than emeralds of this size but contains inclusions which allow this tourmaline to be checked for naturalness. Green is not an unusual color for tourmalines, but the combination of size and the color green can only be found in rare big, clear rough tourmalines with the right amount of green in them. Cutting a tourmaline always means to maintain its best body color. If the rough tourmaline is too dark, then the tourmaline can easily be cut out of the rough piece. The rough piece is an elongated trigonal prism and allows a big-size tourmaline. If the color is not so intense then the cutter uses the stone´s pleochroism and cuts the table facet at the point of the rough stone which means that the stone has to be big in the beginning to maintain a large diameter. Green tourmalines tend to be either too light green or too dark green. Especially bigger tourmalines, of which only very few are found each year in an intense color, are suitable to show their inherent best color as the stone´s table will be bigger. Tourmalines grow elongated, so their diameter is growing slowly. This is the reason why big-sized tourmalines of a color which is neither too dark nor too light are very rare.

Tourmaline

Tourmaline

NameTourmaline
Weight (ct)65.47
Colordark-green
Shapeemerald
Dimensions (LxWxH)25.40x19.96

Green tourmalines tend to be either too light green or too dark green. But not this one! Especially bigger tourmalines, of which only very few are found each year in an intense color, are suitable to show their inherent best color as the stone´s table will be bigger. Tourmalines grow elongated, so their diameter is growing slowly. This is the reason why big-sized tourmalines of a color which is neither too dark nor too light are very rare. The green color is usually caused by iron, but unusually green tourmalines can exhibit a green caused by vanadium and chromium. This specifically is rare and this stone´s dark-green color is partially caused by vanadium as well. This stone is clearer than emeralds of this size but contains inclusions which allow this tourmaline to be checked for naturalness. Green is not an unusual color for tourmalines, but the combination of size and the color green can only be found in rare big, clear rough tourmalines with the right amount of green in them. Cutting a tourmaline always means to maintain its best body color. If the rough tourmaline is too dark, then the tourmaline can easily be cut out of the rough piece. The rough piece is an elongated trigonal prism and allows a big-size tourmaline. If the color is not so intense then the cutter uses the stone´s pleochroism and cuts the table facet at the point of the rough stone which means that the stone has to be big in the beginning to maintain a large diameter.

Tourmaline

Tourmaline

NameTourmaline
Weight (ct)76.89
Colorgreen
Shapeemerald
Dimensions (LxWxH)26.18x20.80

Cutting a tourmaline always means to maintain its best body color. This happened in this big-sized tourmaline because despite its size the color is still warm and intriguing. If the rough tourmaline is too dark, then the tourmaline can easily be cut out of the rough piece. The rough piece is an elongated trigonal prism and allows a big-size tourmaline. If the color is not so intense then the cutter uses the stone´s pleochroism and cuts the table facet at the point of the rough stone which means that the stone has to be big in the beginning to maintain a large diameter. Green tourmalines tend to be either too light green or too dark green. Especially bigger tourmalines, of which only very few are found each year in an intense color, are suitable to show their inherent best color as the stone´s table will be bigger. Tourmalines grow elongated, so their diameter is growing slowly. This is the reason why big-sized tourmalines of a color which is neither too dark nor too light are very rare. The green color is usually caused by iron, but unusual green tourmalines can exhibit a green caused by vanadium and chromium. This specifically is rare. This stone is clearer than emeralds of this size but contains inclusions which allow this tourmaline to be checked for naturalness. Green is not an unusual color for tourmalines, but the combination of size and the color green can only be found in rare big, clear rough tourmalines with the right amount of green in them.

Tourmaline

Tourmaline

NameTourmaline
Weight (ct)47.63
Colorrose
Shaperound
Dimensions (LxWxH)21.2x16.7

Pink tourmalines generally are among the most sought-after when it comes to warm soft colors. Problematic resources which are producing less and less are located in the USA and Middle East. Some African deposits yield facetable material of small sizes or bigger stones (up to 10 cts.) which is of cabochon quality, so non-facetable. This stone here is from Central Africa and belongs to the very old orogenic Mozambique Belt which is between 500 and 600 million years old. This stone is round with a diameter of 21.2 mm and a height of 16.7 mm. All facets not only bring the color to life but also exhibit a great play of reflection. Brought into a set of other stones its play of color, either more to the deep-color side or more to the bright-reflection side can be adjusted by different mounting of this stone in the jewelry. The diameter of over 20 mm and the stones clarity speak for an unusual starting material which is not found in Africa or elsewhere in the world anymore.

Zirkon

Zirkon

NameZirkon
Weight (ct)58.96
Colorblue
Shapeoval
Dimensions (LxWxH)23.21x17.83x13.73

Zircon is a rare gemstone and its fame is due to its chemical and mechanical hardness. That is the reason why the oldest minerals found are zircons (e.g. in the archaic shields of Canada). Zircon contains a lot of rare earth elements and when synthesized these will not be in the synthesis. It has an oval shape with a length of 23.21 mm, a width of 17.83 mm and a height of 13.73 mm. Blue zircons that have not been irradiated are extremely rare, also generally zircons of high cutting quality and weight are not found in high quantities. Reaching almost 60 cts, (58.96 ct.) it belongs to the few big sized zircons in the world.