Opals
Gemstones
Jewelry
Coins
Price
Closed
01/10/2011 04:50 am
PARCEL OF 25 NATURAL RUBY...171 cts
229 views
0 watching
Details
- SKU
- Dimensions (mm)
- x x mm
- Weight (cts)
- Certified Gemstones
- No
- Colours
-
Description
IMPORTANT NOTE: This item contains fissure filled cavities that may contain glass, cobalt, or other materials. Due to the presence of these materials, this item should be referred to as a composite stone.
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.(article by courtesy of Gemselect from chanthaburi,Thailand)
This is a big parcel of 25 natural ruby from the mines of ORISSA, India...171 cts and sizes between 21X15mm and 7X9mm...clarity opaque...Heat/filled.......For explanation of filled ruby
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.(article by courtesy of Gemselect from chanthaburi,Thailand)
Shipping
| Shipping provider | Shipping to France | Shipping to rest of world | Combined Shipping (France) | Combined Shipping (rest of the world) |
|---|---|---|---|---|
| Standard Shipping - Tracked |
|
|
|
|
| Registered Shipping |
|
|
|
|
Details
- SKU
- Dimensions (mm)
- x x mm
- Weight (cts)
- Certified Gemstones
- No
- Colours
-
Description
IMPORTANT NOTE: This item contains fissure filled cavities that may contain glass, cobalt, or other materials. Due to the presence of these materials, this item should be referred to as a composite stone.
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.(article by courtesy of Gemselect from chanthaburi,Thailand)
This is a big parcel of 25 natural ruby from the mines of ORISSA, India...171 cts and sizes between 21X15mm and 7X9mm...clarity opaque...Heat/filled.......For explanation of filled ruby
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.(article by courtesy of Gemselect from chanthaburi,Thailand)
Shipping
| Shipping provider | Shipping to France | Shipping to rest of world | Combined Shipping (France) | Combined Shipping (rest of the world) |
|---|---|---|---|---|
| Standard Shipping - Tracked |
|
|
|
|
| Registered Shipping |
|
|
|
|
Store
stones from the world to quality.
Pays De La Loire, France
Owned by jeanclaude
Verified
Recent Feedback
-
PositiveIt arrived safely without any problems. The color and shape are exactly as described. Thank you very much.
-
Positive
Paid and shipped - no feedback left after 100 days
-
Positive
Paid and shipped - no feedback left after 100 days
Audit
The Gemstone Sheriff program allows our members to request an audit on any product, which is completed by an independent Gemologist who assesses the accuracy of the item description and pictures.
Shipping Details
Costs:
Transit:
21 days via Registered Shipping
Ships from:
France
Payment Options
Overview
Listing Type :
Standard
Product ID :
226545
Starts : 29th September 2011 05:05 am PDT
* All prices are in USD