What is the other name of corundum?

What is the other name of corundum?

Red corundum is called ruby, blue corundum is called sapphire, and all other colours are called fancy sapphires.

What is the common gemstone name for corundum?

ruby
Most people are familiar with corundum; however, very few people know it by its mineral name – instead they know it by the names “ruby” and “sapphire.” A gemstone-quality specimen of corundum with a deep red color is known as a “ruby.” A gemstone-quality corundum with a blue color is called a “sapphire.” Colorless …

What is the group name for the mineral corundum?

Corundum can also be massive or granular. It forms in syenites certain pegmatites and in high-grade metamorphic rocks. It is concentrated in placer deposits. Mineral Group: Hematite group.

Which stones are corundum?

The corundum family of gemstones consists of ruby and sapphire. Corundum is very compact, dense, and lacks gemstone cleavage. It’s also the second hardest natural mineral after diamond.

Is Amethyst a corundum?

amethyst, a transparent, coarse-grained variety of the silica mineral quartz that is valued as a semiprecious gem for its violet colour. In ancient writings the Latin name amethystus was used for amethyst, purple corundum, and purple garnet. …

What are corundum used for?

In addition to its use as a precious gem, corundum finds some use as an abrasive, owing to the extreme hardness of the material (9 on the Mohs hardness scale). It is used for grinding optical glass and for polishing metals and has also been made into sandpapers and grinding wheels.

What are the names of the different types of corundum?

The name corundum comes from the Sanskrit kuruvinda, meaning “ruby” the name given to red corundum. Ruby and sapphire are gem varieties of corundum. An aluminum oxide, corundum is commonly white, gray, or brown, but gem colors include red ruby and blue, green, yellow, orange, violet, and pink sapphire. Colorless forms also occur.

What can corundum be used for in jewelry?

With its hardness and durability, corundum can be used in jewelry designs that see high traffic or likelihood of impacts: bracelets, rings, anklets, etc. Use corundum according to its color. If red, consider designing as if it were ruby. If blue, the uses of sapphire are a good guideline. Colorless corundum, of course, can go anywhere!

What’s the difference between corundum and white sapphire?

Corundum as ruby, sapphire, and fancy sapphire: Gem-quality corundum is a highly prized and valuable material. When it is bright red in color it is called “ruby.”. When it is blue it is called “sapphire.”. When colorless it is called a “white sapphire.”.

What causes a corundum crystal to turn red?

The red colour is caused by minor amounts of trivalent Cr replacing Al in the crystal structure. Sapphire. Most commonly refers to a blue gem variety of Corundum, but other coloured varieties of Corundum are also described as Sapphire, except red Corundum, which is better known as Ruby.