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Ruby rough stones come from Tanzania of Africa.
Weight: 1 kg
(each piece is from 4 to 35 gram, about 30 to 60 pieces in one lot)
Size: from 16x13x7 mm to 32x30x16 mm
Water has been splashed on the stones for taking the pictures.
The pictures in the listing are just for reference as we are selling multiple pieces with the same pictures.
***
Ruby
A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). The 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. The ruby is considered one of the four precious stones, together with the sapphire, the emerald and the diamond.[1]
Prices of rubies are primarily determined by color. The brightest and most valuable "red" called blood-red, commands a large 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 may indicate that the stone has been treated. Cut and carat (weight) are also an important factor in determining the price. Ruby is the traditional birthstone for July and is always lighter red or pink than garnet.
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 three-point or six-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. Furthermore, rubies can show color changes—though this occurs very rarely—as well as chatoyancy or the "cat's eye" effect.
Rubies have historically been mined in Thailand, the Pailin and Samlout District of Cambodia, Burma, India, Afghanistan and in Pakistan. In Sri Lanka, lighter shades of rubies (often "pink sapphires") are more commonly found. After the Second World War ruby deposits were found in Tanzania, Madagascar, Vietnam, Nepal, Tajikistan, and Pakistan.
Color | Red, may be brownish, purplish, or pinkish |
Crystal habit | Varies with locality. Terminated tabular hexagonal prisms. |
Crystal system | Trigonal (Hexagonal Scalenohedral), symbol (−3 2/m), space group R3c |
Cleavage | No true cleavage |
Fracture | Uneven or conchoidal |
Mohs scale hardness | 9.0 |
Luster | Vitreous |
Streak | white |
Diaphaneity | transparent |
Specific gravity | 4.0 |
Refractive index | nω=1.768–1.772 |
Birefringence | 0.008 |
Pleochroism | Orangey red, purplish red |
Ultraviolet fluorescence | red under longwave |
Melting point | 2044 °C |
Item Specifics | |
---|---|
Gemstone Shape : | Polished |
Certification : | NA |
Wholesale : | No |
Gemstone Creation : | Natural |
Item Width : | NA |
Gemstone Color : | Red |
Number of Pieces : | NA |
Modified Item : | No |
Item Length : | NA |
Cut Grade : | Good |
Gemstone Clarity Grade : | Eye Clean |
Country/Region of Manufacture : | Tanzania, United Republic of |
Transparency : | Opaque |
Gemstone Type : | Ruby |
Gemstone Form : | Rough |
Shape : | Rough |
Treatment : | Untreated, all natural |
Natural/Lab-Created : | Natural |
Country of Manufacture : | Tanzania, United Republic of |
Gemstone Effect : | Iridescence |
Gemstone Treatment : | Not Enhanced |
Total Carat Weight (TCW) : | 5000 |
Gemstone : | Ruby Gemstone |
Brand : | Unbranded |
Country of Origin : | Tanzania, United Republic of |
Color : | Red |
Item Depth : | NA |
Carat Range : | Greater than 6.00 |
Type : | Natural |
Vintage : | No |
California Prop 65 Warning : | NA |
MPN : | NA |
By Paypal
Free shipping cost.
We send the goods to USA, Canada, UK, Australia, New Zealand, EU countries and some other European and Asian countries by E-express, a kind of fast postal service by Hong Kong Post. It usually takes about 6 to 10 working days for delivery.
We send the goods to other countries by registered airmail and will take about 8 to 14 working days for delivery.
Returns: We accept returns with any reason in 30 days.
We will answer buyer messages within 24 hours during working days.
Selltotheworld
From all around the world
Natural Ruby Rough Stone from Tanzania 4 to 35 g small size pieces 1 Kilo KG Lot
Ruby rough stones come from Tanzania of Africa.
Weight: 1 kg
(each piece is from 4 to 35 gram, about 30 to 60 pieces in one lot)
Size: from 16x13x7 mm to 32x30x16 mm
The pictures in the listing are just for reference as we are selling multiple pieces with the same pictures.
*** Ruby A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide). The 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. The ruby is considered one of the four precious stones, together with the sapphire, the emerald and the diamond.[1] Prices of rubies are primarily determined by color. The brightest and most valuable "red" called blood-red, commands a large 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 may indicate that the stone has been treated. Cut and carat (weight) are also an important factor in determining the price. Ruby is the traditional birthstone for July and is always lighter red or pink than garnet. 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 three-point or six-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. Furthermore, rubies can show color changes—though this occurs very rarely—as well as chatoyancy or the "cat's eye" effect. Rubies have historically been mined in Thailand, the Pailin and Samlout District of Cambodia, Burma, India, Afghanistan and in Pakistan. In Sri Lanka, lighter shades of rubies (often "pink sapphires") are more commonly found. After the Second World War ruby deposits were found in Tanzania, Madagascar, Vietnam, Nepal, Tajikistan, and Pakistan.
Payment
By Paypal Shipping
Free shipping cost. We send the goods to USA, Canada, UK, Australia, New Zealand, EU countries and some other European and Asian countries by E-express, a kind of fast postal service by Hong Kong Post. It usually takes about 6 to 10 working days for delivery. We send the goods to other countries by registered airmail and will take about 8 to 14 working days for delivery. Returns
Returns: We accept returns with any reason in 30 days. Contact Us
We will answer buyer messages within 24 hours during working days. All right reserved. |
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