GRADE A STAR RUBY 7.60 CTS [S1730 ]

Item Information

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

SIX STAR RUBY.

This is a beautiful quality 6 star Ruby with reddish purple colours.

We have taken the photo in the sun so you can see how it will look out side.

Hardness 9

Natural -heated

weight7.60  cts app

Size 10x7 xmm

 

As with all our stock you may return it for a full refund if not pleased.

Member of the International coloured stone association.

 

A Ruby is a pink to blood red gemstone, a variety of the mineral corundum. The common red color is caused mainly by the element chromium. Its name comes from ruber, Latin for red. Other varieties of gem-quality corundum are called sapphires.

 

All natural rubies have imperfections in them, including color impurities and inclusions of rutile needles known as "silk". Gemologists use these needle inclusions found in natural rubies to distinguish them from synthetics, simulants, or substitutes. Usually the rough stone is heated before cutting. Almost all rubies today are treated in some form, with heat treatment being the most common practice. However, rubies that are completely untreated but still of excellent quality command a large premium.

Some rubies show a 3-point or 6-point asterism or star. These rubies are cut into cabochons to display the effect properly. Asterisms are best visible with a single-light source, and move across the stone as the light moves or the stone is rotated. Such effects occur when light is reflected off the silk (the structurally oriented rutile needle. inclusions) in a certain way. This is one example where inclusions increase the value of a gemstone.

 

5h 13m 25s

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Pricing & Details

Bid Increment $1.00
Starting Bid $56.00
Auction ID 43606
Watchers 1 watching
Viewed 679 times
Starts 2nd Dec 2016 5:02pm PST
Ends 3rd Dec 2016 5:00pm PST

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