Blue sapphire belongs to the mineral species corundum. It can be a pure blue but ranges from greenish blue to violetish blue.
Name : White Sapphire Weight : 8.39 crt Comment : Natural
IT'S REMARKABLE PTCA BALLOON WITH LOW LESION ENTRY PROFILE
GEM
Yellow Golden Cowrie from Solomon Islands.
Rare gemstones like alexandriate and blue sapphire.
Blue saphires.Sourcing
Ceylon sapphire.
Sapphire DCX.
Ruby, sapphire.
Ruby sapphire.
Ruby, sapphire.
Rough sapphire.
Honing refers to a set of stones (sticks) assembled on the honing head put pressure on the work-Piece along the radial, and through rotating and moving back and forth for precision honing machine. When honing high hardness and toughness materials, the Diamond /CBN Efficiency of honing stone( stick) is 3-75 times higher than that of ordinary abrasive stone, and the honing efficiency of ordinary materials is also improved about 10 times. since Diamond/CBN honing stone (stick) wear is less, the shape retention is better, therefore, the higher honing accuracy and economic effect can be obtained. Diamond honing stick is used to process hard and brittle materials, such as honing high carbon steel, cast iron, cemented, carbide, etc. honing stick mainly used for honing high strength alloy steel, tool steel, stainless steel heat-resistant alloy steel. Customized is OK
Blue sapphire gemstone.
Certified natural blue sapphires.
Gemstones like ruby, sapphire.
Natural blue sapphire.
Precious gemstones, yellow sapphire.
4mm = ( in three color ) rounds 100 carets
