18/03/2026
What is a Ruby?
Ruby is the red variety of the mineral corundum (aluminum oxide, chemical formula Al₂O₃). The striking red hue comes from trace amounts of chromium impurities. All other colors of corundum are classified as sapphires (e.g., blue, pink, yellow). Rubies are considered the rarest and most valuable of the corundum family, often commanding the highest prices per carat among colored gemstones.
Here are some close-up views of polished and faceted rubies:Physical Properties
Hardness: 9 on the Mohs scale (second only to diamond at 10), making rubies extremely durable and suitable for everyday jewelry like rings and watches.
Specific Gravity: Around 3.97–4.05.
Color Range: From vivid pigeon-blood red (the most prized, a pure vibrant red with slight blue undertone) to pinkish-red, orangish-red, or brownish-red. The finest quality avoids being too dark (which reduces brightness) or too light.
Transparency: Typically transparent to translucent in gem-quality stones; many have natural inclusions (like silk-like rutile needles that can create a star effect in star rubies).
Luster: Vitreous (glassy) to sub-adamantine.
History and Symbolism
The name "ruby" derives from the Latin word ruber, meaning "red." Ancient cultures believed rubies held the power of life due to their blood-like color. They appear in the Bible and have been linked to passion, protection, wisdom, and vitality for thousands of years.
In many traditions, rubies symbolize love, passion, power, wealth, and protection — often called the "king of gemstones" or a "stone of kings."
Warriors wore them believing they made them invincible in battle.
They were thought to guard against evil, promote health, and even foretell misfortune.
In modern times, ruby remains a symbol of deep emotion, vitality, and commitment.
Rubies have adorned royalty and historical figures for centuries. Famous examples include massive carved rubies in Mughal jewelry or pieces like the Timur Ruby (a historic engraved spinel often confused with ruby in older times, but true rubies feature prominently in crowns and necklaces).
Here are examples of stunning ruby jewelry and famous pieces:
Other Interesting Facts
Birthstone: Ruby is the official birthstone for July.
Rarity: High-quality, large, untreated rubies (especially from classic sources like Burma/Myanmar) are rarer than diamonds of similar size and quality.
Metaphysical Beliefs: In crystal healing, rubies are associated with the root chakra, vitality, courage, and improved circulation/energy.
Rough Form: Uncut rubies often appear as hexagonal crystals or rough masses with a vibrant pink-red color.
Here are examples of rough, uncut ruby crystals:
is the red variety of corundum, renowned as one of the most valuable and symbolically powerful gemstones. Here's an updated overview, including current market insights as of 2026.
Key Properties
Chemical Composition: Aluminum oxide (Al₂O₃) with chromium impurities causing the red color.
Hardness: 9 on the Mohs scale — extremely durable, second only to diamond, ideal for everyday wear in rings, earrings, and more.
Color: Ranges from deep, vivid red (most valuable) to pinkish or orangish tones. The top grade is "pigeon blood" red — a pure, vibrant red with a slight bluish undertone and high fluorescence.
Clarity & Inclusions: Often includes natural "silk" (rutile needles) that can create asterism (star effect) in star rubies. High-clarity, untreated stones are rare and prized.
Luster & Transparency: Vitreous to sub-adamantine; gem-quality rubies are typically transparent to translucent.
Specific Gravity: 3.97–4.05.
Refractive Index: 1.76–1.77 (high brilliance).
