Aquamarine

Hardness: 7.5-8 on Mohs scale. Color: Blue, greenish-blue to blue-green due to iron impurities. Luster: Vitreous (glassy). Crystal Structure: Hexagonal. Cleavage: Indistinct on the basal plane. Specific Gravity: 2.7-2.8

Aquamarine forms in pegmatite veins within granite and other igneous rocks, as well as in hydrothermal veins and metamorphic rocks. Its formation often occurs during the late stages of magmatic crystallization, where beryllium-rich fluids interact with aluminum and silica. Geological age varies significantly depending on the deposit, ranging from hundreds of millions to billions of years.

Predominantly used as a gemstone in jewelry due to its attractive color and good hardness. Larger, clearer specimens are highly prized. It is also collected by mineral enthusiasts.

Aquamarine is the birthstone for March. The name 'aquamarine' comes from the Latin words 'aqua marina', meaning 'water of the sea', referring to its ocean-like color. It is a variety of the mineral beryl, the same mineral family as emerald. The color can be enhanced by heat treatment.

In the field, identify Aquamarine by its characteristic blue to blue-green color, hexagonal crystal shape (when found in crystal form), and hardness (it can scratch glass). It's commonly found in granitic pegmatites. Major sources include Brazil (especially Minas Gerais), Pakistan, Nigeria, Madagascar, Zambia, Mozambique, and the United States (Colorado). Tips for collectors: Look for well-formed crystals in pegmatite pockets. Be aware of color variations and inclusions when assessing quality.