CORUNDUM. Corundum is one of the types of members of this species. Gemstones containing aluminum oxide which is a most important species of precious gemstones found in Sri Lanka. The situation is taken after the gravel rocks are constantly tightened by water after being deployed. Quality kuruis are very expensive and they are called as dark red and orange pink or padmaraga according to color. According to the colour range of Kuruwinda, the decrease in market value is decided. Basic scientific de

Corundum var. Ruby (trapiche) (7.90 ct) - Neelum Dist., Azad Jammu and Kashmir, Pakistan More info: https://www.irocks.com/minerals/specimen/52772 When you first think of red corundum (ruby, to the public), your first thought is of solid red gems and not of this fancy form known as a trapiche in the trade. Trapiche, the six-rayed spoke pattern you see so clearly here, is a less common habit seen in ruby crystals while better known in other gems, like emeralds. What makes this one so uniquely dif

Corundum var. Ruby - Mogok Valley, Pyin-Oo-Lwin Dist., Mandalay Region, Myanmar More info: https://www.irocks.com/minerals/specimen/52293 Rubies from Mogok set the global standard in the colored gemstone industry, for both collectors and investors in gemstones. Mineral collectors feel the same way. When they are good, they are REALLY good. This adorable gem crystal is a classic Mogok ruby with rich color, waxy luster, and a brilliance to it that is hard to describe in some way. It is from the lo