Autumn is the time when pomegranates bear fruit, and among gemstones,GarnetIt is named because of its resemblance to the "seeds" of pomegranates. In the garnet family, there is a special existence, because of its characteristic inclusions called the gemstone with a long tail, it is the protagonist of todayDantoid garnet
Dantoid garnet
Source: Internet.
demantoid, yesAndraditeThe emerald green variety, which contains traces of chromium, has a semi-adamantine luster and high dispersion, and is mainly produced in the contact metamorphic zone of ultramafic rocks. The color ranges from light green, yellow-green to emerald green. Demantoid garnet has a very high refractive index, a higher dispersion value than diamond, super luster, and a particularly rich fire, but the particles are generally smaller, and demantoid garnets over 2 carats are very rare.
First, demantoid garnet has a special horsetail filamentous inclusion
On the inside of demantoid garnets there are some fibrous inclusions, like silk threads, which are yellowish-brown, curved, and radiating outward from the middle. Many people think it resembles a horsetail, hence the name"Horsetail" inclusions, some people feel that it is like the moment when fireworks bloom to be frozen, gorgeous and romantic.
Source: lotus official website.
The "horsetail" inclusions are made up of asbestos minerals that have not been found in any other gemstone before**, making them unique to demantoid garnetsIdentify features
Source: Internet.
In fact, far from degrading the quality of demantoid garnets, the "horsetail" inclusions increase their value due to this unique inclusion. When a gemstone is cut, it is often necessary to preserve the characteristics of the package as much as possible. When the position of the "horsetail" inclusions is in the right position, it seemsFireworksBlooming from it will be a plus for its appearance. If the inside of demantoid garnet is very pure, then it is also collectible.
Second, the main origin of demantoid garnet
Demantoid garnet was discovered in 1868Russian Ural region, which is the most important source of demantoid garnet, produces demantoid garnets in excellent color and a beautiful emerald green color. Moreover, the demantoid garnet produced in Russia can mostly be seen in the "horsetail-shaped" special inclusions, which is very representative and commercially valuable.
Russian demantoid garnet Source: Internet.
And secondly, it isNamibiaIn 1996, demantoid garnet was discovered in the marble of the Damara Orogenic Belt in central Namibia, which is now known as the "Green Dragon Mine". Namibia produces demantoid garnets with average color, occasional better color, and better clarity.
Namibian demantoid Source: Internet.
In addition to this, in:Madagascar, Pakistan, IranDemantoid garnet has also been mined in other places, and demantoid garnet has also been occasionally found in Afghanistan, Italy, Canada and other places but has not been commercially mined.
Demantoid crystals
Three, the "twins" demantoid and tsavorite
In fact, in the garnet family, demantoid garnet also has a "twin". in the garnet familyTsavorIn recent years, it has received a lot of attention, and it is also a green garnet, how to distinguish it from demantoid?
First of all, it can be distinguished by color. Tsavorite is transparent due to its presence of chromium and vanadiumVerdant green, and demantoid garnet will have it in greenYellow tones
Tsavorite At the same time, its fire and luster can also be observed from the naked eye. Demantoid garnetDispersion valueQuite high, even more than diamonds. Comparatively speaking, demantoid garnet far surpasses tsavorite in terms of fire and luster, so it has a stronger commercial value.
Finally, we can also look at both under a ten-fold magnifying glassInclusions, demantoid garnet has diagnostic "horsetail-like" inclusions, while tsavorite has some gas-liquid inclusions and crystalline inclusions.
Source: Internet.
After reading this article, I believe that you in front of the screen must also be amazed by the wonderful charm of gemstones!They were born of natureFantasticHidden deep in the dark cave, it brings people unparalleled surprise and shock. Demantoid garnet, a kindThe jewel of the "long tail"., I wonder if you're in love with it too?