Aquamarine
Real mineral · uncommon · Be₃Al₂Si₆O₁₈
Blue beryl coloured by ferrous iron. Forms in granitic pegmatites as well-developed hexagonal prisms. Its name derives from the Latin for sea water. Heat treatment at 400°C removes greenish tones, producing a purer blue.
Identity
Crystallography
- Crystal system
- hexagonal
- Habits
- prismatic, columnar
- Fracture
- conchoidal
Physical properties
- Mohs hardness
- 7.5
- Density
- 2.72 g/cm³
- Luster
- vitreous
- Colors
- sky blue, blue-green, blue, pale blue
- Streak
- white
- Transparency
- transparent, translucent
Geology
- Origins
- igneous, hydrothermal
- Host rocks
- pegmatite, granite
- Associated minerals
- Tourmaline, Quartz, feldspar, Mica
- Geography
- Brazil, Pakistan, Madagascar, Russia, Nigeria
Classification
- Rarity
- uncommon
- Gem quality
- Yes
Arcane properties
- Affinity
- water, air
- Effects
- scrying, healing
- Planar origin
- Material Plane
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