Difference between sapphire and tanzanite

Sapphire and tanzanite are both stunning gemstones, but they differ significantly in composition, appearance, and origin.

Sapphire is a variety of the mineral corundum, primarily composed of aluminum oxide. It is known for its incredible hardness, ranking 9 on the Mohs scale, making it second only to diamond. Sapphires come in a variety of colors, but blue sapphires, with shades ranging from deep royal blue to lighter sky blue, are the most iconic. Sapphires are found in locations like Sri Lanka, Madagascar, Kashmir, Afghanistan and Australia.

Tanzanite, on the other hand, is a rare variety of the mineral zoisite, composed of calcium aluminum silicate. It is much softer, with a Mohs hardness of 6 to 7, requiring more care. Its captivating violet-blue color, often enhanced through heat treatment, sets it apart. Tanzanite is unique to Tanzania, specifically near Mount Kilimanjaro.

In terms of value, sapphire is typically more durable and versatile, while tanzanite’s rarity and vivid hues make it a prized collector’s gemstone. Both stones are exquisite but cater to different tastes and purposes.