bE dur ya

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བE་དུར་ཡ
lapis lazuli. The Sanskrit vaidurya means 'utterly bright.' [RY]

gemstone (in general) [RB]

lapis lazuli [IW]

lapis, lapis lazuli [RY]

azure stone, lapis lazuli, lapis, lapis lazuli [RY]

(med) see bai dU rya Lapislazuli (Drungtso 1999), Corundum (Lapislazuli) (Yeshi 2018)
The name Lapis Lazuli has been used both to describe the blue mineral previously known as lazurite (but which in most cases is actually a S-rich variety of Hauyne) and the rock that is made up predominantly of this mineral plus calcite, pyrite and other minerals. In general, today the name Lapis Lazuli is used to describe the material used as a decorative stone (ie, the rock) rather than the mineral component. Haüyne is a vitreous mineral, with colors from blue, white, grey, yellow and green to pink. Lazurite (mu men, Yeshi 2018) is resinous, with colors from ultramarine, midnight-blue to bluish-green (mindat.org)
It may be judicious to stay with the term Vaidurya or bai dU rya, since the word Lapislazuli which is commonly applied to the opaque composite rock, does not fit the description (the color of the sky and transparent, like a diamond or crystal). And the transparent mineral Haüyne, which is it's main constituent giving the blue color, does fit the description, but is basically unknown and doesn't invoke much.
Johannes Schmidt (talk) 16:35, 22 November 2021 (UTC)