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This is a very nice HYDROTHERMAL EMERALD...Colombian green color...A quality (IF/VVS+)...Emerald cut...2,05cts and 8x8mm.

This is a very nice HYDROTHERMAL EMERALD...The green color of the Colombian natural emerald...Emerald cut...2,05cts and 8x8mm... Our gems have same chemical and gemological properties as their natural counterparts. The only difference is that natural stones are found by men while ours are made by men.We have 3 qualities: A,B,C.:A is IF,B is slithly included and C is little more included.These qualities make the HYDROTHERMAL EMERALD the same as the natural one.

Hydrothermal Process and How it is done
(Production of Emeralds and other colored Beryl, Rubies, Sapphires and other colored and white corundum)

Hydrothermal method is based on transformation of melted crashed emeralds and deposit of consequent solution around the beryl seed in a hydrothermal environment. The crashed low grade emeralds, known as nutrient, are melted along with color inducing chemicals, such as Vanadium and Chromium, that are ones of the nature‚s coloring agents in emeralds, and deposited onto a natural beryl seed. The seed, being a larger and more solid element in the process, attracts smaller particles of the same origin and the growth process begins, depositing layer upon layer on itself. This is the reason for undulated growth lines in hydrothermally grown gems. The process takes around four weeks. If the process is slowed down, the “ layers” are deposited at a slower rate, resulting in growth lines being less defined and more difficult to detect. The process starts by gradually heating the autoclave. Subsequent rise in temperature leads to rise in pressure, as a result of liquid expansion inside the inner vessel. Once the temperature rises to about 600 C and pressure is around 800 PSI, the process reaches an ultimate equilibrium and a melt process begins. Smaller particles are attracted by the larger element, the seed, hence starting the growth process.

Cut Colombian Color
Hydrothermal Emerald!

Hydrothermal cut ruby,
photo courtesy of Jean Claude Levandowski

Rough Hydrothermal Aquamarine

Rough Eme B grade (94.55 Cts.)
Dimention 60 x 23 x 4.4
Rough Eme C grade (103.15 Cts.)
Dimention 71 x 23 x 4.4
Here are some chemical formulas of Hydrothermal Gems:
Cr + Be3Al2Si6O18
Red Beryl
Co2+, Co3+ - Be3Al2Si6O18
Purple Beryl
Mn3+, Co2+, Co3+ - Be3Al2Si6O18
Orange Beryl
Co2+, Co3+, Cr3+ - Be3Al2Si6O18
Fe2+, Fe3+ - Be3Al2Si6O18
Blue Sapphire
Fe2+, Ti4+ - Al2O3
Cr3+ - Al2O3
Light Yellow Sapphire
Fe3+ - Al2O3
Yellow Sapphire
Ni3+ - Al2O3
Padparadscha Sapphire
Cr3+, Ni + - Al2O3
Violet Sapphire
Cr3+, Ni + - Al2O3
Green Sapphire
Co3+ - Al2O3

$260.00 USD

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Pricing & Details

Auction ID 3630
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Viewed 6,551 times
Starts 15th Mar 2013 6:39am PDT

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