gemstone
Aquamarine
Beryl (Be3Al2Si6O18)
AI-generated identification · may be incorrectMohs hardness 7.5-8; pale blue to light green-blue color; vitreous luster; hexagonal crystal system; distinct basal cleavage is poor.
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Physical properties
Mohs hardness 7.5-8; pale blue to light green-blue color; vitreous luster; hexagonal crystal system; distinct basal cleavage is poor.
Formation & geological history
Forms within pegmatites and hydrothermal veins during late-stage magmatic crystallization in metamorphic and igneous rocks.
Uses & applications
Valued primarily as a precious gemstone in fine jewelry, and collected by mineral enthusiasts.
Geological facts
Aquamarine is the blue variety of beryl, with the color caused by trace amounts of ferrous iron (Fe2+). Large, flawless gem-grade crystals are historically prized.
Field identification & locations
Identified by its distinctive hexagonal prism habit, high hardness, and pale blue-green coloration. Commonly mined in Brazil, Pakistan, Madagascar, and the USA.
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