About: dbkwik:resource/XCv7E4hGJFtyUo3SXOXlyQ==   Sponge Permalink

An Entity of Type : dbkwik:resource/6IIoeMLPkySiK--1vpcViQ==, within Data Space : 134.155.108.49:8890 associated with source dataset(s)

AttributesValues
rdf:type
rdfs:label
  • Demantoid
rdfs:comment
  • It has the misnomers; olivine, and Uralian emerald. In approximately 2003, reports began to circulate in the trade that some Russian Demantoid garnets were being routinely subjected to heat treatment in order to enhance their colour. Such treatment is believed to be performed at relatively low temperatures and is not thought to be detectable by gemmological testing.
sameAs
dcterms:subject
dbkwik:ceramica/pr...iPageUsesTemplate
opticalprop
  • Single Refractive
mohs
  • 65(xsd:integer)
Gravity
  • 384(xsd:integer)
Name
  • Demantoid
dispersion
  • 57(xsd:integer)
formula
  • Ca3Fe2Si3O12
System
  • cubic
pleochroism
  • none
Color
  • light to deep green
refractive
  • 1880(xsd:integer)
abstract
  • It has the misnomers; olivine, and Uralian emerald. In approximately 2003, reports began to circulate in the trade that some Russian Demantoid garnets were being routinely subjected to heat treatment in order to enhance their colour. Such treatment is believed to be performed at relatively low temperatures and is not thought to be detectable by gemmological testing.
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