Raw Corundum Value Guide

Raw Corundum represents the natural, uncut state of aluminum oxide, encompassing both rubies and sapphires before they are faceted. This mineral is highly collectible due to its extreme hardness and its historic significance dating back to ancient India where it was first prized as a gemstone.

What Is Raw Corundum Worth?

The typical price range for Raw Corundum is $50 - $100 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• Color saturation and hue, with deep reds (rubies) and vivid blues (sapphires) commanding the highest prices.
• Crystal clarity and the presence of internal fractures which determine if the piece is facet-grade or specimen-grade.
• Geographic origin, as stones from historically significant mines in Madagascar or Australia can influence desirability.
• Overall carat weight and the preservation of the natural crystal faces.

How to Identify Raw Corundum?

• Verify a hardness of 9 on the Mohs scale, as corundum is the second hardest natural mineral after diamond.
• Look for a hexagonal crystal system, often appearing as barrel-shaped or tabular prisms in the rough.
• Check for a vitreous to adamantine luster and a high specific gravity that feels heavy for its size.
• Examine the specimen for characteristic 'silk' or rutile inclusions common in stones from Sri Lanka and Myanmar.

History of Raw Corundum

Corundum has been known and utilized for millennia. The earliest recorded use of corundum as a gemstone dates back to ancient India, where rubies and sapphires were highly prized. Its exceptional hardness made it valuable not only for jewelry but also for abrasive purposes. The material's scientific study began in the 18th century, leading to a deeper understanding of its crystalline structure and composition.