demantoid

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de·man·toid

 (dĭ-măn′toid′)
n.
A transparent, green variety of garnet used as a gem.

[German, from archaic Demant, diamond, from Middle High German diemant, from Old French diamant; see diamond.]

demantoid

(dɪˈmæntɔɪd)
n
(Minerals) a bright green variety of andradite garnet
[C19: from German, from obsolete Demant diamond, from Old French diamant + -oid]

de•man•toid

(dɪˈmæn tɔɪd)

n.
a brilliant green andradite garnet, used as a gem.
[1890–95; < German, = (obsolete) Demant diamond + -oid -oid]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.demantoid - a green andradite used as a gemstonedemantoid - a green andradite used as a gemstone
andradite - a garnet consisting of calcium iron silicate and having any color ranging from yellow and green to brown and black; used as gemstone
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References in periodicals archive ?
Occasionally, some "old-time" Val Malenco demantoids appear on the scene, these specimens having been passed from dealer to dealer at increasing prices with the recycling of old collections.
It looked like serpentine studded with green garnet crystals, very much like the demantoids from Val Malenco
These crystals are prime gem stock (having no "horsetail" inclusions like those found typically in demantoids from Val Malenco, Italy and from Russia), and so most of those found have already been butchered, I mean cut and faceted.