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Peru Pink Opal – mined from Andean mountains of Peru
All materials have been cleaned, free of dirt and debris.
Size: 53x52x33 mm
Weight: 401.5 carat (80.3 gram)
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Opal
Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Because of its amorphous character, it is classed as a mineraloid, unlike crystalline forms of silica, which are classed as minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt. Opal is the national gemstone of Australia.
The internal structure of precious opal makes it diffract light; depending on the conditions in which it formed, it can take on many colors. Precious opal ranges from clear through white, gray, red, orange, yellow, green, blue, magenta, rose, pink, slate, olive, brown, and black. Of these hues, the black opals are the most rare, whereas white and greens are the most common. It varies in optical density from opaque to semitransparent.
Precious opal shows a variable interplay of internal colors, and though it is a mineraloid, it has an internal structure. At microscopic scales, precious opal is composed of silica spheres some 150 to 300 nm in diameter in a hexagonal or cubic close-packed lattice. The regularity of the sizes and the packing of these spheres determines the quality of precious opal. Where the distance between the regularly packed planes of spheres is around half the wavelength of a component of visible light, the light of that wavelength may be subject to diffraction from the grating created by the stacked planes. The colors that are observed are determined by the spacing between the planes and the orientation of planes with respect to the incident light.
For gemstone use, most opal is cut and polished to form a cabochon. "Solid" opal refers to polished stones consisting wholly of precious opal. Opals too thin to produce a "solid" may be combined with other materials to form attractive gems. Jewelry applications of precious opal can be somewhat limited by opal's sensitivity to heat due primarily to its relatively high water content and predisposition to scratching.
Item Specifics | |
---|---|
Shape : | Rough |
Brand : | Unbranded |
Length : | 53 |
Width : | 52 |
Depth : | 33 |
Total Carat Weight (TCW) : | 401.5 |
Treatment : | None (No Enhancement) |
Transparency : | Opaque |
Cut Grade : | Good |
Country of Origin : | Peru |
Color : | Pink |
Country/Region of Manufacture : | Peru |
Natural/Lab-Created : | Natural |
Modified Item : | No |
Gemstone Type : | Opal |
Gemstone Color : | Pink |
Gemstone Creation : | Natural |
Gemstone Form : | Rough |
Gemstone Treatment : | Not Enhanced |
Gemstone Clarity Grade : | Eye Clean |
Item Length : | 53 mm |
Item Width : | 52 mm |
Item Depth : | 33 mm |
Gemstone Effect : | Opalescence |
Number of Pieces : | 1 |
Wholesale : | No |
Vintage : | No |
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Free shipping cost.
We send the goods to USA, Canada, UK, Australia, New Zealand, EU countries and some other European and Asian countries by E-express, a kind of fast postal service by Hong Kong Post. It usually takes about 6 to 10 working days for delivery.
We send the goods to other countries by registered airmail and will take about 8 to 14 working days for delivery.
Returns: We accept returns with any reason in 30 days.
We will answer buyer messages within 24 hours during working days.
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PINK OPAL Rough Gemstone from Peru 401.5 CARAT Piece 53x52x33 mm Nice Natural
Peru Pink Opal – mined from Andean mountains of Peru
All materials have been cleaned, free of dirt and debris.
***
Payment
By Paypal Shipping
Free shipping cost. We send the goods to USA, Canada, UK, Australia, New Zealand, EU countries and some other European and Asian countries by E-express, a kind of fast postal service by Hong Kong Post. It usually takes about 6 to 10 working days for delivery. We send the goods to other countries by registered airmail and will take about 8 to 14 working days for delivery. Returns
Returns: We accept returns with any reason in 30 days. Contact Us
We will answer buyer messages within 24 hours during working days. All right reserved. |
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