PARCEL AFRICAN RUBY ROUGH 282.2 CTS AAT919

Item Description Pictures Bidding History Comments

About This Auction		About This Seller: AAAgems
Minimum Bid (USD)		Feedback Rating	99.60% Positive
Current Bid (USD)	0.00	Member Since	23 Jun 2007 in Australia
Bid Increment (USD)	1.00	View feedback Send seller message View 3209 other auctions from this seller More about this seller
Bids Placed	0
Starting Bid (USD)	45.00
Reserve Price (USD)	none
Starts	March 15, 2010 4:05 PM
Ends	March 19, 2010 4:00 PM	Basic Shipping Information
Auction Category	Ruby Gemstones > Rough Ruby	Shipping Cost	3.00 paid by buyer
Auction ID	148007	Shipping Insurance (optional)	7.00
Ends in 8 hours 27 minutes
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Description

Parcel ruby rough that has been treated and now ready to cut or facet

parcel weighs 282.2 CTS average size might cut 16X15X7 stones

ruby rough from africa

A Ruby is a pink to blood-red gemstone a variety of the mineral corundum (aluminium oxide]. The common red color is caused mainly by the presence of the element chromium. Its name comes from ruber, Latin for red. Other varieties of gem-quality corundum are called sapphires. Prices of rubies are primarily determined by color. The brightest and best "red" called pigeon blood-red, commands a huge premium over other rubies of similar quality. After color follows clarity: similar to diamonds, a clear stone will command a premium, but a ruby without any needle-like rutile inclusions will indicate that the stone has been treated one way or another. Cut and carat (size) also determine the price

TREATMENTS

The most common treatment is the application of heat. Most if not all rubies at the lower end of the market are heat treated on the rough stones to improve color, remove purple tinge, blue patches and silk. These heat treatments typically occur around temperatures of 1800°C (3300°F).Some rubies undergo a process of low tube heat, when the stone is heated over charcoal of a temperature of about 1300°C (2400°F) for 20 to 30 minutes. The silk is only partially broken as the color is improved.

Special Information

information regarding glass filled rubies

More Information

Certified Gemstones: no
Does Ruby have filled cavities or fissures: no
Weight: 282.2 carats

Bidding History


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