Kashmir sapphire
Sapphire and Ruby contact
Sapphire ( Sapphire ) and ruby are sisters gems, they all belong to the corundum minerals, is in addition to the Diamond Sapphire Pendant beyond Earth the hardest natural mineral, basic chemical composition of alumina. In addition to star effect, only translucent or transparent and colorful corundum can be called the gem. Red and chrome corundum red adjustable elements, it was known as the ruby; blue sapphire ( Sapphire ) is because it contains the trace of titanium and iron. In fact, in addition to red corundum, all other tones in the commercial is called sapphire corundum ( Sapphire ).
Therefore, sapphire ( Sapphire ) not only refers to the blue corundum, except it has a complete blue series, and like fireworks like the sunset yellow, pink,mineralization
orange and purple, the color of sapphire ( Sapphire ) are collectively referred to as colored sapphire ( Sapphire ).
Main components
Sapphire component is alumina, because it contains trace elements Ti ( Ti4 + ) or iron ( Fe2 + ) and blue. Is a three crystal system. Crystal morphology are usually cylindrical, short column, plate shape, geometry for granular or compact massive. Transparent to translucent, vitreous luster. Sapphire crystal refractive index 1.76-1.77, double refraction rate 0.008, two color and strong. Heterogeneous body. Sometimes has special optical effect – star effect. The hardness is 9 3.95-4.1, density g / cm. No cleavage, fracture of science development. Under certain conditions, can produce beautiful six shooting stars, known as the" star sapphire".
Sapphire can be divided into blue sapphire and the bright color ( blue ) sapphire. Color is produced with India" cornflower blue" is the best. Sapphire is said to protect the king and the monarchy from harm," the imperial stone " is called.produce turquoise
The international gemstone sapphire as the" September Birthstone", symbol of affection, loyal and faithful. Sapphire is the world’s five largest high-grade gemstones precious one.
Sapphire and similar blue gems, synthetic gems from blue. Similar blue gem is blue, blue, blue zircon spinel tourmaline, Benitoite, kyanite, such as cordierite. Similar synthetic gems, synthetic spinel synthetic sapphire, containing cobalt blue glass. The blue tip spar raw sapphire: uniform color, microstrip gray, crystal in eight face of the body, homogeneous body, no two color. Blue : the color is blue with green tourmaline crystals, as three party columnar, hardness, density, refractive index is lower than the sapphire, two color extremely obvious, double refraction rate. Blue zircon zircon: after heat treatment,DVB T RECEIVER bright color, good dispersion, high birefringence rate. Synthetic sapphire: uniform color, clean, inclusions are scarce, a round bubble, homogeneous body.
The evaluation and choice of sapphire. The evaluation and choice of sapphire factor is the color, weight, transparency and clarity. Sapphire is the biggest characteristic of uneven color, polysynthetic twin agenesis, two color and strong. The Burma region producing sapphire, with bright blue ( titanium containing coloring ), because it contains inclusions, can produce six or twelve rayed star shot. India Kashmir sapphire, a cornflower blue, is a microstrip purple indigo blue, bright color, quality sapphire. Sri Lanka, Thailand, China, Australia produced sapphire also features. Sapphire has a brittle, wear should avoid beat, knocking.