While titanium is not a new metal it continues to be one that industries look to for strength and durability. With a high specific strength (comprised of the ratio of tensile strength to density), titanium is 45% lighter than steel and 60% heavier than aluminum. With uses ranging from being used to make white paint to helping produce artificial gems, titanium is widespread across a number of industries and used in a number of different ways.
Titanium does not oxidize quickly nor does it corrode quickly in water. Continue reading The Various Properties of Titanium
Better known to the public as sapphire and ruby, the mineral species corundum is a widely distributed oxide of aluminum which ranks next to diamond in hardness and sometimes occurs so abundantly that it is mined for abrasive purposes. However, clear gemstone varieties are far less common than the course abrasive types, one of which “emery” is familiar to craftsmen as the coating on emery paper and abrasive wheels. In North America, much abrasive corundum has been mined from deposits in Canada and the Eastern part of the US, while clear gem quality material has been obtained in large quantity from Montana.
Some specimens exhibit the beautiful effect known as “asterism”, forming the ever popular star sapphire and star ruby.
By custom, the individual species name ruby is applied only to gem material of pure intense red, all other colors being sapphire. Continue reading Corundum Mineral