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6.15 CTS STAR RUBY - RED/ PURPLE STONE [RUB49]
- SKU
- Dimensions (mm)
- x x mm
- Weight (cts)
- Certified Gemstones
- No
- Colours
-
STAR RUBY STONE
Birthstone for July
This is a red /purple stone showing a strong star .
Oval shape
Mohs scale 9
Grading eye clean
Weight 6.15 ct
Size 10 x 8 x 7 mm app
Note we have taken the photo in the sun as this gives the best display of the star
Star Rubies are beautiful gemstones that display a six-ray star that seems to glide magically across the surface of the gem when the latter is moved. This six-ray star is caused due to an optical phenomena known as "Asterism". The term "Asterism" is derived from the Greek word "aster", which means star, so asterism is commonly referred to as "star" or "star-effect". In simple words, asterism is a star-shaped light effect across the surface of gems. Other popular gemstones that display asterism are Star Sapphire, Star Rose Quartz, Star Garnet, Star Diopside, Star Moonstone, Star Spinel and Star Opal.
A Ruby is a pink to blood-red gemstone a variety of the mineral corundum (aluminium oxide]. The common red color is caused mainly by the presence of the element chromium. Its name comes from ruber, Latin for red. Other varieties of gem-quality corundum are called sapphires. Prices of rubies are primarily determined by color. The brightest and best "red" called pigeon blood-red, commands a huge premium over other rubies of similar quality. After color follows clarity: similar to diamonds, a clear stone will command a premium, but a ruby without any needle-like rutile inclusions will indicate that the stone has been treated one way or another. Cut and carat (size) also determine the price
TREATMENTS
The most common treatment is the application of heat. Most if not all rubies at the lower end of the market are heat treated on the rough stones to improve color, remove purple tinge, blue patches and silk. These heat treatments typically occur around temperatures of 1800°C (3300°F).Some rubies undergo a process of low tube heat, when the stone is heated over charcoal of a temperature of about 1300°C (2400°F) for 20 to 30 minutes. The silk is only partially broken as the color is improved.
| Type 1 Gemstones |
| The following gemstones are typically inclusion free, even minor inclusions detract from their value. |
| Diamond, Amethyst, Beryls(Aquamarine,Morganite), Citrine, Smoky Quartz, topaz, Chrysoberyl, Kunzite, Tanzanite, green Tourmaline, and Blue Zircon |
| IF | Internally flawless under extreme magnification (Very rare) |
| F | Flawless |
| VVS | Minute inclusions under 10x; invisible to the unaided eye |
| VS | Minor inclusions under 10x; usually invisible to the unaided eye |
| SI1 | Noticeable inclusions under 10x; usually visible to the unaided eye |
| SI2 | Noticeable inclusions under 10x; usually quite visible to the unaided eye |
| I1 | prominent- moderate affect on appearance or durability |
| I2 | prominent - severe affect on appearance or durability |
| I3 | prominent- severe affect on beauty, transparency or durability |
| Type 2 Gemstones |
| Gemstones that normally have small inclusions that do not detract from value. |
| Alexandrite, Andalusite, Iolite, Peridot, Rhodolite, Ruby, Sapphire, Spinel, Tourmaline, Garnet, Amethyst, Red Zircon, Tsavorite; Blue, Orange, Purple, Fluorite.Yellow and Parti-colored Tourmaline |
| F | Flawless |
| VVS | Minor inclusions under 10x; usually invisible to the unaided eye |
| VS | Noticeable inclusions under 10x; often invisible to the unaided eye |
| SI1 | Obvious inclusions under 10x; visible to the unaided eye |
| SI2 | Obvious inclusions under 10x; very apparent to the unaided eye |
| I1 | prominent - moderate affect on appearance or durability |
| I2 | prominent - severe affect on appearance or durability |
| I3 | prominent - severe affect on beauty, transparency or durability |
- SKU
- Dimensions (mm)
- x x mm
- Weight (cts)
- Certified Gemstones
- No
- Colours
-
STAR RUBY STONE
Birthstone for July
This is a red /purple stone showing a strong star .
Oval shape
Mohs scale 9
Grading eye clean
Weight 6.15 ct
Size 10 x 8 x 7 mm app
Note we have taken the photo in the sun as this gives the best display of the star
Star Rubies are beautiful gemstones that display a six-ray star that seems to glide magically across the surface of the gem when the latter is moved. This six-ray star is caused due to an optical phenomena known as "Asterism". The term "Asterism" is derived from the Greek word "aster", which means star, so asterism is commonly referred to as "star" or "star-effect". In simple words, asterism is a star-shaped light effect across the surface of gems. Other popular gemstones that display asterism are Star Sapphire, Star Rose Quartz, Star Garnet, Star Diopside, Star Moonstone, Star Spinel and Star Opal.
A Ruby is a pink to blood-red gemstone a variety of the mineral corundum (aluminium oxide]. The common red color is caused mainly by the presence of the element chromium. Its name comes from ruber, Latin for red. Other varieties of gem-quality corundum are called sapphires. Prices of rubies are primarily determined by color. The brightest and best "red" called pigeon blood-red, commands a huge premium over other rubies of similar quality. After color follows clarity: similar to diamonds, a clear stone will command a premium, but a ruby without any needle-like rutile inclusions will indicate that the stone has been treated one way or another. Cut and carat (size) also determine the price
TREATMENTS
The most common treatment is the application of heat. Most if not all rubies at the lower end of the market are heat treated on the rough stones to improve color, remove purple tinge, blue patches and silk. These heat treatments typically occur around temperatures of 1800°C (3300°F).Some rubies undergo a process of low tube heat, when the stone is heated over charcoal of a temperature of about 1300°C (2400°F) for 20 to 30 minutes. The silk is only partially broken as the color is improved.
| Type 1 Gemstones |
| The following gemstones are typically inclusion free, even minor inclusions detract from their value. |
| Diamond, Amethyst, Beryls(Aquamarine,Morganite), Citrine, Smoky Quartz, topaz, Chrysoberyl, Kunzite, Tanzanite, green Tourmaline, and Blue Zircon |
| IF | Internally flawless under extreme magnification (Very rare) |
| F | Flawless |
| VVS | Minute inclusions under 10x; invisible to the unaided eye |
| VS | Minor inclusions under 10x; usually invisible to the unaided eye |
| SI1 | Noticeable inclusions under 10x; usually visible to the unaided eye |
| SI2 | Noticeable inclusions under 10x; usually quite visible to the unaided eye |
| I1 | prominent- moderate affect on appearance or durability |
| I2 | prominent - severe affect on appearance or durability |
| I3 | prominent- severe affect on beauty, transparency or durability |
| Type 2 Gemstones |
| Gemstones that normally have small inclusions that do not detract from value. |
| Alexandrite, Andalusite, Iolite, Peridot, Rhodolite, Ruby, Sapphire, Spinel, Tourmaline, Garnet, Amethyst, Red Zircon, Tsavorite; Blue, Orange, Purple, Fluorite.Yellow and Parti-colored Tourmaline |
| F | Flawless |
| VVS | Minor inclusions under 10x; usually invisible to the unaided eye |
| VS | Noticeable inclusions under 10x; often invisible to the unaided eye |
| SI1 | Obvious inclusions under 10x; visible to the unaided eye |
| SI2 | Obvious inclusions under 10x; very apparent to the unaided eye |
| I1 | prominent - moderate affect on appearance or durability |
| I2 | prominent - severe affect on appearance or durability |
| I3 | prominent - severe affect on beauty, transparency or durability |
| Shipping provider | Shipping to Australia | Shipping to rest of world |
|---|---|---|
| FedEx | $12.00 / 3 days | $39.00 / 10 days |
|
Australia
FedEx is discounted to $12.00 on orders with 2 or more items
Rest of the world
FedEx is discounted to $39.00 on orders with 2 or more items
|
||
| Registered Shipping | $9.00 / 7 days | $16.00 / 21 days |
|
Australia
Registered Shipping is discounted to $9.00 on orders with 2 or more items
Rest of the world
Registered Shipping is discounted to $16.00 on orders with 2 or more items
|
||
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