EOIDOTE QUARTZ SPECIMEN -POLISHED 20 CTS [MX1255 ]

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About This Seller: mineralgemworld

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Feedback Rating 99.52% Positive
Current Bid (USD) 0.00 Member Since 1 Sep 2007 in Australia
Bid Increment (USD) 1.00
Bids Placed 0
Starting Bid (USD) 32.00
Reserve Price (USD) none
Starts March 20, 2010 6:05 PM
Ends March 21, 2010 6:00 PM Basic Shipping Information
Auction Category Quartz Gemstones > Quartz Stones Shipping Cost 3.00 paid by buyer
Auction ID 82957 Shipping Insurance (optional) 7.00

Ends in 4 hours 17 minutes

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Description

POLSIHED EPIDOTE IN QUARTZ

This piece is well polished both sides and it would look stunning in a pendant.

The epidote is deepest gemmy green in bladed to tabular crystals.The quartz crystal is very clear and clean.Mined in brazil.

Weight 20 cts app

Size 29x 24x3.4 mm app

Epidote is a structurally complex mineral having both single silicate tetrahedrons, SiO4, and double silicate tetrahedrons, Si2O7. The formula of epidote could be expressed in a such a way so as to reflect this organization; Ca2(Al, Fe)Al2O(SiO4)(Si2O7)(OH). The two aluminums represent the parallel chains of AlO6 and AlO4(OH)2 octahedra that are the heart of the epidote structure. The silicate groups and extra ions connect the chains together. Since the chains are parallel, the crystals tend to be prismatic. The chains are arranged in parallel planes and the perfect cleavage breaks the bonds between these planes. Epidote, while not general known for exceptional crystals can produce some magnificent specimens. Its unique green color which is often described as "pistachio", is quite striking in well colored specimens

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ONE ITEM
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EIGHT ITEMS
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EIGHT TO 30 ITEMS
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.At www.opalauctions.com we have the following sites
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