- Uralian emerald
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demantoid: not a true emerald.
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Universalium. 2010.
Uralian emerald
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uralian emerald — noun Usage: usually capitalized U : demantoid * * * demantoid: not a true emerald … Useful english dictionary
Important gemstones — ▪ Table Important gemstones mineral gem name colour Mohs hardness* specific gravity* beryl aquamarine sky blue to greenish blue 7½–8 2.68–2.71 emerald green 2.68–2.74 goshenite colourless; greenish yellow, yellow green, brownish same as… … Universalium
Demantoid — General Category Mineral … Wikipedia
demantoid — /di man toyd/, n. Mineral. a brilliant green variety of andradite garnet, used as a gem. Also called Uralian emerald. [1890 95; < G, equiv. to (obs.) Demant DIAMOND ( < MHG diemant < OF diamant) + oid OID] * * * … Universalium
Ural Mountains — a mountain range in the W Russian Federation, extending N and S from the Arctic Ocean to near the Caspian Sea, forming a natural boundary between Europe and Asia. Highest peak, Mt. Narodnaya, 6214 ft. (1894 m). Also called Urals. * * * Mountain… … Universalium
andradite — /an dreuh duyt /, n. a mineral, calcium iron garnet, Ca3Fe2Si3O2, occurring in brown, green, or black crystals. [1830 40; named after J. B. de ANDRADA E SILVA; see ITE1] * * * ▪ gemstone calcium iron garnet, perhaps the most spectacular garnet… … Universalium