Rubies are red gemstones primarily composed of corundum, a crystalline form of aluminum oxide. The term "fine ruby" suggests a ruby with exceptional color, clarity, cut, and carat weight, making it highly valuable and sought after in the gemstone market.
The finest rubies often have a vivid, intense red color and are free from noticeable inclusions or imperfections. They are prized for their rarity, durability (as Sapphire they have a hardness of 9 on the Mohs’ scale), and symbolic significance. Factors like color intensity, transparency, and origin greatly influence their value.
Ruby is the birthstone for July, the zodiac stone for Aries and the 40th anniversary stone. There is long held belief that rubies signify heat and some believe they have soothing and healing properties.
Most rubies and sapphires have been exposed to heat, which burns off certain minerals which can improve their clarity. Because heating may occur naturally in the Earth’s crust, it has been an acceptable practise to enhance the clarity and brightness of these gemstones using heat for many hundreds of years.