Natural ruby is a highly valued gemstone known for its vibrant red color, which ranges from light pink to deep red. It is a variety of the mineral corundum, which also includes sapphires in other colors. Rubies are prized for their beauty, rarity, and durability.
Key Features of Natural Ruby:
1. Composition and Structure:
Rubies are composed of aluminum oxide (Al₂O₃) with chromium as the trace element responsible for their red color. The crystal structure of rubies is hexagonal, contributing to their hardness and brilliance.
2. Color Range:
The color of rubies can vary from light pinkish-red to deep, intense red. The most desirable rubies exhibit a rich, deep red color, often referred to as "pigeon blood red," which is the most prized hue.
3 Hardness and Durability:
rubies are very durable, with a hardness of 9 on the Mohs scale. This makes them suitable for everyday wear in rings, necklaces, and other types of jewelry.
4. Occurrence:
Natural rubies are found in various locations around the world, including Myanmar (Burma), Thailand, Sri Lanka, Madagascar, and Mozambique. Myanmar has historically been known for producing some of the finest rubies.
5. Inclusions:
Rubies often contain inclusions, known as "silk," which are needle-like rutile crystals. These inclusions can affect the gem's clarity but are often used to identify natural rubies. High-quality rubies with minimal inclusions are rarer and more valuable.
6. Treatment:
Many rubies undergo heat treatment to enhance their color and clarity. While this is a common practice, untreated rubies are rarer and more highly prized. Other treatments, such as filling, can also be used to improve the appearance of rubies.
