Product Detail:

Ruby [1] , which means corundum of a red color, is a type of corundum and consists primarily of aluminum oxide (AL 2O 3) . The red color comes from chromium (CR) , mainly Cr2O3, the content is generally 0.1 ~ 3% , the highest is 4% . Containing Fe, Ti and blue said Sapphire, non-chromium CR color of other colors of corundum also collectively known as Sapphire.

Most natural rubies come from Asia (Burma, Thailand, Sri Lanka, Pakistan, China Xinjiang, China Yunnan, etc.) , Africa (Mozambique, Tanzania) , Oceania (Australia) , and America (Montana and South Carolina) . Today’s rubies are mainly produced in Mozambique.

Natural rubies are very rare and therefore very valuable, but synthetic rubies are not too difficult, so industrial rubies are synthetic. In 1999, a 67.5-carat red and blue corundum was found in Changle County, Shandong Province, China. It is called “Mandarin Duck Gem”, which is a rare miracle in the world. In 2012 several ruby deposits were found in the Karakash river bed of the Karakax County River in the Wada region of Xinjiang, the largest being 32.7 carats.

physical property：

Refractive index: 1.762 ~ 1.770, birefringence: 0.008 ~ 0.010;

Density: 4.00g/cm3; Typical absorption lines; The hardness and sapphire are side by side behind the diamond, which is the second largest hardness 9. Therefore, only the diamond can be engraved on its surface. A line can be easily drawn on the surface of the glass with one of its edges and corners (the hardness of the glass is less than 6). The cracks are relatively divergent. There are many cracks inside the common ruby, that is, the so-called "ten red and nine cracks" of ruby. It has obvious dichroism, and sometimes its color change can be seen by the naked eye from different angles. The original shape of ruby before processing is barrel and plate.