The Chemistry, Properties and Tests of Precious Stones (Esprios Classics) (Paperback) (ISBN-13: 9781034143628)

"What constitutes a precious stone is the question which, at the onset, rises in the mind, and this question, simple as it seems, is one by no means easy to answer, since what may be considered precious at one time, may cease to be so at another. There are, however, certain minerals which possess distinctive features in their qualities of hardness, colour, transparency, refractability or double refractability to light-beams, which qualities place them in an entirely different class to the minerals of a metallic nature. These particular and non-metallic minerals, therefore, because of their comparative rarity, rise pre-eminently above other minerals, and become actually "precious.""

Author: John Mastin
ISBN-10: 103414362X
ISBN-13: 9781034143628
Publisher: Blurb
Language: English
Published: 06/26/2024
Pages: 90
Format: Paperback
Weight: 0.32lbs
Size: 9.00h x 6.00w x 0.22d