Ad
related to: blue topaz carat weight chart melee value list mm2
Search results
Results from the WOW.Com Content Network
A ruby is a pink to blood-red colored gemstone, a variety of the mineral corundum (aluminium oxide).Other varieties of gem-quality corundum are called sapphires.Ruby is one of the traditional cardinal gems, together with amethyst, sapphire, emerald, and diamond. [1]
The carat (ct) is a unit of mass equal to 200 mg (0.00705 oz; 0.00643 ozt), which is used for measuring gemstones and pearls. The current definition, sometimes known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, [1] [2] and soon afterwards in many countries around the world.
Topaz is a silicate mineral made of aluminum and fluorine with the chemical formula Al 2 Si O 4 (F, OH) 2.It is used as a gemstone in jewelry and other adornments. Common topaz in its natural state is colorless, though trace element impurities can make it pale blue or golden brown to yellow-orange. [7]
American Golden Topaz, the largest cut yellow topaz, weighing nearly 23,000 carats (4.6 kg). Chalmers Topaz , a 5,899.5-carat (1.17990 kg) cut topaz. Tsavorite
Blue-violet National Museum of Natural History, Washington [9] Star of Bombay: Sri Lanka 182 carats (36.4 g) Star Blue-violet National Museum of Natural History, Washington [10] Ruspoli Sapphire: 136.9 carats (27.38 g) [11] Stuart Sapphire: Sri Lanka 104 carats (20.8 g) Blue Tower of London [12] Bismarck Sapphire: Myanmar: 98.56 carats (19.712 ...
The value of aquamarine is determined by its weight, color, [5] cut, and clarity. [8] Due to its relative abundance, aquamarine is comparatively less expensive than other gemstones within the beryl group, such as emerald or bixbite (red beryl), however it is typically more expensive than similarly colored gemstones such as blue topaz .
The Tereshchenko Diamond, sometimes known as the Tereshchenko Blue, is a 42.92 carat diamond of blue colour that is cut in the pear shape. The diamond is rare, belonging to the Type IIb diamond, and believed to originate from India. The Tereshchenko diamond is the second biggest blue diamond in the world.
Several ruby-set pieces were included in the sale, notably a ring set with an 8.24 ct gem that broke the 'price-per-carat' record for rubies (US$512,925 per carat – i.e., over US$4.2 million in total), [37] and a necklace [38] that sold for over US$3.7 million. The Liberty Bell Ruby is the largest mined ruby in the world. It was stolen in a ...
Ad
related to: blue topaz carat weight chart melee value list mm2