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19.44ct Burgundy Color Rubellite Tourmaline, 100% Natural Untreated Gem
- 存货单位
- 尺寸(毫米)
- 24.000 x 10.000 x 9.000mm
- 重量 (cts)
- 19.440
- Treatment
- No Treatment
- Shape
- Baguette
- 类型
- Faceted
- Clarity
- SI
- 颜色
-
100% guaranteed natural untreated tourmaline. Inclusions are less then appearing in the pictures and exceptional luster
Color: Burgundy Red
Cut -Baguette cut
Lustre -Exceptional lustre
Origin: Afghanistan
Clarity- Transparent / Slightly included
Treatment: NONE
Measuraments: 24*10*9mm
Elbaite, chemically is Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)3OH, a very chemically complex mineral containing sodium, lithium, aluminum, silicon, boron, oxygen and hydrogen. It is a member of the tourmaline group. The name tourmaline comes from the Sinhalese word “Thuramali,” meaning colored stone. The pronunciation of the word changed to tourmaline by the linguistic mangling of European traders from the Dutch East India company that imported stones of multicolored tourmaline, likely mostly elbaite and dravite from Sri Lanka in the 17th and 18th centuries. The tourmaline group minerals, including elbaite are fondly known as the “garbage pail minerals” by geologists because they act as a sink for many incompatible lithophile elements (lithium, boron, fluorine) that cannot fit in the crystal structures of most rock forming minerals. Tourmaline, especially elbaite isn’t garbage at all in the eyes of gemologists, jewelrymakers, and mineral collectors who value the mineral for its diverse, vivid coloration, high luster, and hardness. Elbaite can be faceted into beautiful gemstones or wirewrapped- both are appropriate for the mineral considering its high hardness of 7 1/2 on Moh’s hardness scale.
Elbaite crystals are colorless if completely chemically pure, but are usually brightly colored. Iron impurities color elbaite green and blue while manganese impurities color elbaite pink and red. Pink and red elbaite crystals showing high color saturation usually have been exposed to elevated levels of natural geological radiation when they are forming deep in the earth. This radiation is caused by decay of potassium-40 and oxidizes the manganese from Mn(II) to Mn(III) which increases the color saturation. This exposure to radiation does not make the crystals dangerous in any way. Elbaite can be artificially treated or enhanced after collecting. The most common treatment is irradiation, which deepens the color similar to how it happens naturally. Irradiation in elbaite stones is usually impossible to detect. elbaite can also be heat treated to enhance color. Clarity enhancement of rarer elbaite such as Paraiba tourmaline seriously detracts their value.
Payments:
Payments: Our payment is expected within 1 days after the end of each auction. If the payment is not received on time, your order will be cancelled.
Shipment:
We ship 2-3 days after we receive complete payment. Combined shipping possible.
Return:
Any item may be returned for refund within 7 days of receipt (the date you receive the item through the shipper).
Item(s) must be returned in original condition. If an item is damaged it can not be refunded.
- 存货单位
- 尺寸(毫米)
- 24.000 x 10.000 x 9.000 mm
- 重量 (cts)
- 19.440
- Treatment
- No Treatment
- Shape
- Baguette
- 类型
- Faceted
- Clarity
- SI
- 颜色
-
100% guaranteed natural untreated tourmaline. Inclusions are less then appearing in the pictures and exceptional luster
Color: Burgundy Red
Cut -Baguette cut
Lustre -Exceptional lustre
Origin: Afghanistan
Clarity- Transparent / Slightly included
Treatment: NONE
Measuraments: 24*10*9mm
Elbaite, chemically is Na(Li1.5Al1.5)Al6Si6O18(BO3)3(OH)3OH, a very chemically complex mineral containing sodium, lithium, aluminum, silicon, boron, oxygen and hydrogen. It is a member of the tourmaline group. The name tourmaline comes from the Sinhalese word “Thuramali,” meaning colored stone. The pronunciation of the word changed to tourmaline by the linguistic mangling of European traders from the Dutch East India company that imported stones of multicolored tourmaline, likely mostly elbaite and dravite from Sri Lanka in the 17th and 18th centuries. The tourmaline group minerals, including elbaite are fondly known as the “garbage pail minerals” by geologists because they act as a sink for many incompatible lithophile elements (lithium, boron, fluorine) that cannot fit in the crystal structures of most rock forming minerals. Tourmaline, especially elbaite isn’t garbage at all in the eyes of gemologists, jewelrymakers, and mineral collectors who value the mineral for its diverse, vivid coloration, high luster, and hardness. Elbaite can be faceted into beautiful gemstones or wirewrapped- both are appropriate for the mineral considering its high hardness of 7 1/2 on Moh’s hardness scale.
Elbaite crystals are colorless if completely chemically pure, but are usually brightly colored. Iron impurities color elbaite green and blue while manganese impurities color elbaite pink and red. Pink and red elbaite crystals showing high color saturation usually have been exposed to elevated levels of natural geological radiation when they are forming deep in the earth. This radiation is caused by decay of potassium-40 and oxidizes the manganese from Mn(II) to Mn(III) which increases the color saturation. This exposure to radiation does not make the crystals dangerous in any way. Elbaite can be artificially treated or enhanced after collecting. The most common treatment is irradiation, which deepens the color similar to how it happens naturally. Irradiation in elbaite stones is usually impossible to detect. elbaite can also be heat treated to enhance color. Clarity enhancement of rarer elbaite such as Paraiba tourmaline seriously detracts their value.
Payments:
Payments: Our payment is expected within 1 days after the end of each auction. If the payment is not received on time, your order will be cancelled.
Shipment:
We ship 2-3 days after we receive complete payment. Combined shipping possible.
Return:
Any item may be returned for refund within 7 days of receipt (the date you receive the item through the shipper).
Item(s) must be returned in original condition. If an item is damaged it can not be refunded.
运输商 | 运送至:国家 | 运送到世界其他地区 |
---|---|---|
Express Shipping | $10.00 / :几天天 | $69.00 / :几天天 |
世界其他地区
Express Shipping 对包含 2 或更多商品的订单折扣为 $75.00
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||
Registered Shipping | $10.00 / :几天天 | $19.50 / :几天天 |
:国家
Registered Shipping 对包含 2 或更多商品的订单折扣为 $15.00
世界其他地区
Registered Shipping 对包含 2 或更多商品的订单折扣为 $25.00
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积极的
nice large emerald
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积极的
Thank you Sami
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积极的
Thank you Sami
审计
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描述准确
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图片准确
Comments
The Verified Seller has provided accurate and honest pictures and details for this listing. Gem Rock Auctions is committed to holding our sellers to the highest standards of integrity and transparency. As part of this policy, we only permit the sale of natural, earth mined, gemstones. Many Gemstones have received treatments to enhance their color or clarity to further emphasize their beauty and we insist treatments are disclosed. Manmade, synthetic, and imitation gemstones are not permitted on Gem Rock auctions.