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$49.00 USD
Precio
Cerrado
06/03/2024 11:22 am
2649
15

0.19ct Paraiba Tourmaline , 100% Natural Gemstone

SKU
Dimensiones (mm)
3.520 x 3.510 x 2.240mm
Peso (cts)
0.190
Treatment
No Treatment
Tipo
Faceted
Colores

100% guaranteed natural untreated tourmaline.  Appearence more shiny and rich then in pic. The inclusions are seen in the pictures as is the property of any high defination camera.

Cut -Round cut

Lustre -Fine lustre

Tone - medium Saturation:strong Origin: Africa Clarity- Transparent / Eye clean Treatment: NONE

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.

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smsgems
Feel free to make an offer at any item! Main Business Activity: Colored Stone Wholesaler Additional Business Activities: Laboratories / Appraisers Wholesaler - Colored Stones Wholesaler - Diamonds Memberships: IGS İSG GLOBAL INSURANCE INSTITUTE OF JEWELRY APPRAISAL IGA Stone grading may vary +1 / -1 grade. The Origin of the stone is a sellers opinion. RETURNS WILL HAVE -10% RESTOCK FEE!
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5747 de comentarios

  • colinmandy1
    colinmandy1
    Positivo

    Beautiful stone thank you I will be buying more

  • camillebela
    camillebela
    Positivo

    Even more beautiful in person, fast shipping

  • wiets
    wiets
    Positivo

    Thank you

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Detalles de envío

Envío:
$25.00 :cuenta días a través de :proveedor
Se envía desde:
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  • paypal
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Descripción general

Tipo de listado : Standard
ID del Producto : 821567
Empieza : 22nd February 2024 08:37 pm PST
* Todos los precios están en :moneda