Morganite, also known as “pink beryl”, “rose beryl”, “pink emerald”, and “cesian (or caesian) beryl”, is a rare light pink to rose-colored gem-quality variety of [...]
Heliodor is a yellow variety of beryl, a beryllium aluminum silicate mineral with a hardness of 7.5 to 8. Its crystal system is hexagonal (trigonal) [...]
Topaz is an aluminum silicate fluoride hydroxide crystal with a hardness of 8. Its crystal structure is orthorhombic, and it frequently forms prismatic crystals. The [...]
Aquamarine is a blue or blue-green variety of beryl, a beryllium aluminum silicate mineral with a hrdness of 7.5 to 8. Its crystal system is [...]
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