Rubies are used in making Lasers.
i don't think anyone knows
mostly turquoise, larimar, pearl, ruby, emerald, blue sapphire, lapis and coral
sandpaper, optics, glass, liquid filters, circuit boards, computer components, cement , mortar, and jewelry.
During the late-Georgian period, jewelers used sapphires for except jewellery to try out new gem cuts, the most popular being the rose cut and table cut.
Because of its remarkable hardness, sapphire is used in many applications, including infrared optical components, watch crystals, high-durability windows, and wafers for the deposition of semiconductors, such as GaN nanorods and blue LEDs.Black sapphires are also used a lot in jewelry. They are getting more and more fashion. For good example of black sapphires you can view this website: http://www.cbsgemstones.com
Precious metals such as gold, silver, and platinum are refined from mineral ores. Diamond, rubies, emeralds, jade, and other crystalline forms of minerals are cut and polished as gemstones. Amber is mineralized tree sap similarly used.
Sapphire
is aquamarine used for anything other than jewelry
There are many possible uses for the stone sapphire. The pretty sapphire stone can be used in jewelry for example.
They are also used for cutting glass
They are used in LASERs (Light Amplification Stimulated Emission of Radiation)
platinum is most precious than gold
B'coz they are less reactive than other metals..
Sapphires are comonly used in jewelry. But It is also the September Birthstone. To find more out search Sapphire on Google
mostly turquoise, larimar, pearl, ruby, emerald, blue sapphire, lapis and coral
since they are less reactive than other metals.. they are used to make jewellery
Zircon is a gemstone used in rings and other jewelry. Zincite is another stone used in jewelry.
Turquoise beads can be used to make many different craft projects as well as jewelry. This color is a favorite among many people, and looks great as a necklace or bracelet.