86 CTS RUBY ROUGH LARGE [F1001 ]

Item Information

Dimensions (mm) not provided
Weight (carats) 86 carats
Colors
Certified Gemstone
Filled Cavities or Fissure/Cobalt

 

 

RUBY ROUGH

 

 

Birthstone for  July

 

This are two pieces which have been joined together by a liquid glass. The specimen is heat treated /glass filled showing stunning colours of red with a purplish tinge.This specimen can be cut into a large specimen or it is ideal as a carving piece.

 

Mohs scale 9

Weight  86.05 cts

Size  30 x  22 x 11 mm app

 

 

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.

1d 23h 23m 59s

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Pricing & Details

Bid Increment $1.00
Starting Bid $34.00
Auction ID 132242
Watchers 11 watching
Viewed 1,240 times
Starts 5th Dec 2016 4:02am PST
Ends 7th Dec 2016 4:00am PST

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