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VERY NICE NATURAL CERTIFIED RUBY CABOCHON 6,913 cts
- SKU
- Dimensions (mm)
- x x mm
- Weight (cts)
- Certified Gemstones
- Yes
- Colours
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This is a very nice certified ruby from the mines of Madagascar...Cabochon cut...6,913cts and 11,75x8,51x5,86mm...Heat and filled
Small cracks or fractures in a gemstone can interrupt the flow of light through the stone, creating white or "dead" spots in the color of the stone. Sometimes these fractures–if they reach the surface of the stone–will be filled with material that will allow the light to pass through smoothly.The process of fracture filling ruby with transparent lead glass is a recent innovation that began about 2004 in Chanthaburi, Thailand. Rubies of good color, primarily from Madagascar, that are disfigured by fissures or surface cracks can be "repaired" using heat treatment with lead glass. The refractive index of corundum and lead glass are very similar, allowing light to travel through the stone, improving the color and clarity. These rubies are often found in large sizes at a fraction of the cost of untreated ruby of similar color. So they represent an excellent value in the market, so long as the treatment is disclosed and the price is appropriate. The Asian Institute of Gemology tested fractured filled rubies for durability and found them to be more durable than a typical emerald fracture-filled with oil or resin. AIGS advised against excessive heating with a jeweler's torch, but found no negative effects from cleaning with detergents or ultrasonic devices. They advise that hydrofluoric acid should not be used on these gems, and that any recutting or repolishing should be performed with care.
- SKU
- Dimensions (mm)
- x x mm
- Weight (cts)
- Certified Gemstones
- Yes
- Colours
-
This is a very nice certified ruby from the mines of Madagascar...Cabochon cut...6,913cts and 11,75x8,51x5,86mm...Heat and filled
Small cracks or fractures in a gemstone can interrupt the flow of light through the stone, creating white or "dead" spots in the color of the stone. Sometimes these fractures–if they reach the surface of the stone–will be filled with material that will allow the light to pass through smoothly.The process of fracture filling ruby with transparent lead glass is a recent innovation that began about 2004 in Chanthaburi, Thailand. Rubies of good color, primarily from Madagascar, that are disfigured by fissures or surface cracks can be "repaired" using heat treatment with lead glass. The refractive index of corundum and lead glass are very similar, allowing light to travel through the stone, improving the color and clarity. These rubies are often found in large sizes at a fraction of the cost of untreated ruby of similar color. So they represent an excellent value in the market, so long as the treatment is disclosed and the price is appropriate. The Asian Institute of Gemology tested fractured filled rubies for durability and found them to be more durable than a typical emerald fracture-filled with oil or resin. AIGS advised against excessive heating with a jeweler's torch, but found no negative effects from cleaning with detergents or ultrasonic devices. They advise that hydrofluoric acid should not be used on these gems, and that any recutting or repolishing should be performed with care.
| Shipping provider | Shipping to France | Shipping to rest of world |
|---|---|---|
| Standard Shipping - Tracked | $8.00 / 7 days | $8.00 / 21 days |
|
France
Standard Shipping - Tracked is discounted to $10.00 on orders with 4 or more items
Rest of the world
Standard Shipping - Tracked is discounted to $10.00 on orders with 4 or more items
|
||
| Registered Shipping | $8.00 / 7 days | $8.00 / 21 days |
|
France
Registered Shipping is discounted to $8.00 on orders with 4 or more items
Rest of the world
Registered Shipping is discounted to $8.00 on orders with 4 or more items
|
||
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Positivevery nice piece!
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Positive
The magnifier was defective but the company reimbursed all of my costs including shipping so I was happy working with this seller .
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Positive
Paid and shipped - no feedback left after 100 days
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Comments
The Verified Seller has provided accurate and complete information for this gemstone including weight, dimensions and treatments where applicable.
