ISSN:
1476-4687
Source:
Nature Archives 1869 - 2009
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
Notes:
[Auszug] The properties of the stone (which weighed 1-41 carats) were found to be: refractive indices to = 1-723, e = 1-719, uniaxial negative; density 3-62; hardness 8 on Mohs's scale. Apart from the birefringence, it will be seen that these properties are very close to those for spinel; but an X-ray ...
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1038/167438b0
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