The Biggest Black Star Ruby in the World
Star Ruby is a traditional sub-variety of Ruby which is a red member of the corundum group. Ruby is closely related to Sapphire and thus has many gemological properties such as hardness, composition and multiple refraction. Corundum gemstone varieties include sapphires, star sapphires (Sapphire Star) and sapphire changes in color. Ruby, cat's eye stone and Ruby star are available but also quite rare. Trapiche rubies consist of fixed stars and are often cut and traded in slices. Some trap rubies can also display asterism, but such stones are very rare. Ruby Star may be easily confused with red garnet or spinel.
Found a black Ruby Star called the Black Star of Queensland reflecting the basic nature of the gem and its place of origin. Black Star Ruby 733 carat Queensland is the largest black Ruby star in the world, and was discovered in the 1930s in the Anakie Sapphire region in the Rubyvale region of Queensland State, in northeast Australia.
Found a black Ruby Star called the Black Star of Queensland reflecting the basic nature of the gem and its place of origin. Black Star Ruby 733 carat Queensland is the largest black Ruby star in the world, and was discovered in the 1930s in the Anakie Sapphire region in the Rubyvale region of Queensland State, in northeast Australia.
Black Star The 733-carat Ruby is an oval-shaped gem cut like a cabochon like all other Ruby stars, but its rays or stars are not as long as normal blue star sapphires and other colored star sapphires that stretch from the center of the corset. The rays in the blue star sapphire are also quite thin and narrow and tapered towards the corset. On the other hand, the black star's sapphire beam is shorter and thicker stretching about halfway from the middle towards the corset. Rays are not the same length; some are shorter than others. However, the center of the star is much bigger and brighter than normal star sapphires. The appearance of a bright six-star star in a truly black background is very beautiful. The beauty of this stone is increasingly refined by its white gold setting where large black stones are surrounded by a row of 35 smaller pear-shaped white diamonds. Color contrast is amazing. Like all other star sapphires, the star moves with changes in the angle of illumination and observation.
Black Star Ruby, like all other sapphires, belongs to a group of minerals known as corundum, a form of aluminum oxide crystals (Al2O3), which is after diamond, the most famous natural substance, with hardness 9 on the Mohs scale. Corundum crystallizes in a hexagonal system, producing a pyramidal shape or round barrel shape. Like diamonds, corundum is formed billions of years ago inside the earth, under the earth's crust and in the mantle, under conditions of high temperature and pressure. Furthermore, when the magma cools, igneous and corundum rocks are incorporated into this deposit. Then when igneous rocks are converted into sedimentary and metamorphic rocks, corundum is also incorporated into these rocks. Continuous coating and erosion of rock for millions of years releases crystalline corundum washed in the hills and stored in river floods as alluvial deposits.
In a state of pure corundum it is colorless, like a pure Diamond that is also colorless. However, the incorporation of trace amounts of impurities in the corundum crystal structure causes various colors, which include all rainbow colors such as purple, indigo, blue, green, yellow, orange, red and pink. Other colors include gray, brown and black. All colors of corundum except red are known as sapphires. Red corundum is known as ruby. The general color in sapphires is blue. Other colors like purple, green, yellow, orange and pink are known as fancy colored sapphires. The blue color in sapphire is caused by trace amounts of iron and titanium. The green color is caused by traces of nickel, an orange color with traces of chromium and iron.
Black Star Ruby, like all other sapphires, belongs to a group of minerals known as corundum, a form of aluminum oxide crystals (Al2O3), which is after diamond, the most famous natural substance, with hardness 9 on the Mohs scale. Corundum crystallizes in a hexagonal system, producing a pyramidal shape or round barrel shape. Like diamonds, corundum is formed billions of years ago inside the earth, under the earth's crust and in the mantle, under conditions of high temperature and pressure. Furthermore, when the magma cools, igneous and corundum rocks are incorporated into this deposit. Then when igneous rocks are converted into sedimentary and metamorphic rocks, corundum is also incorporated into these rocks. Continuous coating and erosion of rock for millions of years releases crystalline corundum washed in the hills and stored in river floods as alluvial deposits.
In a state of pure corundum it is colorless, like a pure Diamond that is also colorless. However, the incorporation of trace amounts of impurities in the corundum crystal structure causes various colors, which include all rainbow colors such as purple, indigo, blue, green, yellow, orange, red and pink. Other colors include gray, brown and black. All colors of corundum except red are known as sapphires. Red corundum is known as ruby. The general color in sapphires is blue. Other colors like purple, green, yellow, orange and pink are known as fancy colored sapphires. The blue color in sapphire is caused by trace amounts of iron and titanium. The green color is caused by traces of nickel, an orange color with traces of chromium and iron.
