SAPPHIRE CRYSTAL ROUGH FROM MOGOK 4.50 CTS [F2343]

Item Information

Dimensions (mm) not provided
Weight (carats) not provided
Colors
Certified Gemstone

QUALITY ROUGH

SAPPHIRE ROUGH 

 This is a natural untreated specimen from  Myanmar[Burma].Great specimen or it can be cut.

 

Weight 4.50 cts app

 

Size 13.8 x 6.3 x 4.9 mm app

 

Sapphire is one of the two gem varieties of the species corundum. Although blue is the best known hue, the gem occurs in virtually every spectral hue excepting red. Red corundum is a ruby. Sapphire may also be colorless, and it also occurs in the non-spectral shades, gray and black. Yellow and green sapphires have traces of iron that gives them their color. Pink sapphires have a trace of the element chromium and the deeper the color pink the higher their monetary value as long as the color is going toward the red of rubies. Sapphires also occur in shades of orange and brown, and colorless sapphires are sometimes used as diamond substitutes in jewelry. Salmon-color padparadscha sapphires often fetch higher prices than many of even the finest blue sapphires.  

 

Treatments

Some natural sapphires are heated to improve or enhance color. This is usually done by heating the sapphires to temperatures of up to 1800 °C for several hours, or by heating in a nitrogen deficient atmosphere oven for seven days or more. On magnification, the silk due to included rutile needles are often visible. If the needles are unbroken, then the stone was not heated; if the silk is not visible then the stone was heated adequately. If the silk is partially broken, then a process known as low tube heat may have been used. Low tube heat is the process whereby the rough stone is heated to 1300 °C over charcoal for 20 to 30 minutes. This removes grey or brown in the stone and improves color saturation.

 

 

19h 20m 40s

Buy Now $18.00
$
Shipping $3.00
21 Days via Standard Shipping
0 bids placed so far
Add to Watch List Ask a Question * All prices in USD

Audit Information

The Gemstone Sheriff program allows our members to request an audit on any auction, which is completed by an independent gemologist who assesses the accuracy of the item description and pictures.

Request Audit

Pricing & Details

Bid Increment $1.00
Starting Bid $18.00
Auction ID 203898
Watchers 6 watching
Viewed 1,257 times
Starts 2nd Dec 2016 11:02pm PST
Ends 3rd Dec 2016 11:00pm PST

Shipping & Insurance

Provider Shipping Transit
FedEx $3.00 5 Days
Registered Shipping $3.00 10 Days
Standard Shipping $3.00 21 Days
Shipping Insurance all providers $7.00 (optional)

About Quality Rough

Hello! Gem Rock Auctions is a global marketplace offering beautiful gemstones from professional gemstone cutters, dealers & miners. Register for $10 off your first purchase.