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01/10/2011 04:50 am
PARCEL OF 25 NATURAL RUBY...171 cts
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Détails
- UGS
- Dimensions (mm)
- x x mm
- Poids (cts)
- Certified Gemstones
- Non
- Couleurs
-
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)
Expédition
| Fournisseur d'expédition | Expédition vers France | Expédition dans le reste du monde | Expédition combinée ( France ) | Expédition combinée (reste du monde) |
|---|---|---|---|---|
| Standard Shipping - Tracked |
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| Registered Shipping |
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Détails
- UGS
- Dimensions (mm)
- x x mm
- Poids (cts)
- Certified Gemstones
- Non
- Couleurs
-
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)
Expédition
| Fournisseur d'expédition | Expédition vers France | Expédition dans le reste du monde | Expédition combinée ( France ) | Expédition combinée (reste du monde) |
|---|---|---|---|---|
| Standard Shipping - Tracked |
|
|
|
|
| Registered Shipping |
|
|
|
|
Magasin
stones from the world to quality.
Pays De La Loire, France
Propriété de jeanclaude
Vérifié
Commentaires récents
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PositifIt arrived safely without any problems. The color and shape are exactly as described. Thank you very much.
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Paid and shipped - no feedback left after 100 days
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Paid and shipped - no feedback left after 100 days
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Les détails d'expédition
Frais:
Transit:
21 les jours via Registered Shipping
Expédié depuis:
France
Options de paiement
Aperçu
Type d'inscription :
Standard
Identifiant du produit :
226545
Départs : 29th September 2011 05:05 am PDT
* Tous les prix sont en USD