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$21.00 USD
Estimated RRP $42.00
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18/04/2017 11:37 pm

6.855 ct Natural Bolivian Ametrine

SKU
Dimensions (mm)
10.300 x 9.700 x 8.700mm
Weight (cts)
6.855
Treatment
No Treatment
Type
Faceted
Colours

Ametrine is a bi-color quartz variety that, as its name suggests, is a unique combination of amethyst and citrine within a single crystal. How the gem forms is still a bit of a mystery, but the differences in color are believed to be the result of the presence of iron in different states of oxidation from natural heating. Combining the golden sunburst of citrine with the violet sunset of amethyst, this naturally colored gem is commercially mined at a single source: the remote Anah mine in Bolivia and is shrouded in fascinating local legends and lore.

  • Origin Bolivia
  • Treatment None
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AMETRINE CLASSIFICATION

  • Common Name Ametrine
  • Species Quartz
  • Variety Ametrine
  • Colors Bicolored Combination Of Purple, Yellow
  • Alternate Names Trystine, Bolivianite, Amethyst-Citrine, Citrine-Amethyst, Golden Amethyst
  • Gemstone Groups   

Key Separations Ametrine’s appearance is distinctive and otherwise the key quartz indicators will be present (refractive index, birefringence, optic character and optic figure). A bull’s-eye optic figure is determinative for quartz. Might also show Airy’s spiral.

  • Comments Stones might be piezoelectric: able to generate electricity produced by mechanical pressure,Pyroelectricity: development of opposite charges at the ends of the axis due to change in temperature and triboluminescent: luminescence produced by friction.

AMETRINE CHARACTERISTIC PHYSICAL PROPERTIES

  • Hardness 7
  • Streak White
  • Specific Gravity 2.64-2.69 Range:0.03/-0.02 Typical:2.66
  • Toughness Good
  • Inclusions Ametrine is a type II clarity stone. Color zoning in stones is often present in the form of “soap scum”, “tiger stripes” or “zebra stripes”, crystals, negative crystals, liquid inclusions, two-phase inclusions, partially-healed fractures, hematite needles.
  • Luster Vitreous
  • Stability Good
  • Fracture Conchoidal
  • Cleavage None

Shipping provider Shipping to Thailand Shipping to rest of world
FedEx $35.00 / 2 days $35.00 / 4 days
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FedEx is discounted to $35.00 on orders with 2 or more items
Rest of the world
FedEx is discounted to $35.00 on orders with 2 or more items
Express Shipping $55.00 / 2 days $55.00 / 7 days
Thailand
Express Shipping is discounted to $55.00 on orders with 2 or more items
Rest of the world
Express Shipping is discounted to $55.00 on orders with 2 or more items
Registered Shipping $10.00 / 7 days $10.00 / 21 days
Thailand
Registered Shipping is discounted to $10.00 on orders with 2 or more items
Rest of the world
Registered Shipping is discounted to $10.00 on orders with 2 or more items

naturalspectragems
naturalspectragems
Natural Spectra Gems PTY LTD [NSG] a has been operating from Australia, Pakistan and Thailand for the last 11 years, wholesaling semi precious and precious gemstones both in cut/polished as well as rough/specimen, exclusively sourced from around the world and especially from Pakistan, Tajikstan, Afghanistan and Kashmir to which, as you would be aware, access is somewhat limited. Because of my ties to these important mining and market environs, the stones I source are of "high to finest" quality at very attractive prices. Please return the item if for some reasons you do not like the item. After one week we will not accept the return. Please follow our new arrivals on http://naturalspectragems.tumblr.com/ https://www.facebook.com/nsgems https://plus.google.com/NaturalSpectraGems
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Shipping Details

Shipping:
$35.00 4 days via FedEx
Ships from:
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Overview

Listing Type : Standard
Product ID : 591340
Starts : 15th April 2017 01:12 pm PDT
* All prices are in USD