Hardness (Mohs’ Scale): 6-7 Specific Gravity (S.G.): 2.6 Refractive Index (R.I.): 1.53- 1.54
CODE 61CO N002
PRODuCT Carnelian
Crystal System: Trigonal Chemical Composition: Silicon Dioxide
ShAPE/CuT Flat Oval
Carnelian - red and white stripe cabochon CODE
PRODuCT
61CO CR06 61CO CR01
ShAPE/CuT
Carnelian Round Cabochon Carnelian Round Cabochon
SIzE (mm) 12 x 10
£/EACh 5.45
12x10 For bezel cups see PAGE 246
SIzE (mm) 6.0
10.0
£/EACh 2.73
3.14 6.0 PRODUCT FOCUS CARNELIAN
Carnelian is a polycrystalline variety of the mineral Quartz, which is bright orange or reddish-orange in colour. The colour is caused by the presence of iron oxide. Carnelian is a popular and affordable gemstone.
ON THE BENCH
WORKING WITH CARNELIAN Carnelian is a relatively durable material, however, as with all polycrystalline Quartz, care should be taken during setting and polishing.
10.0
CITRINE
Hardness (Mohs’ Scale): 7 Specific Gravity (S.G.): 2.65 Refractive Index (R.I.): 1.54-1.55
Citrine is the yellow variety of the mineral Quartz. It can occur in shades of gold to brownish yellow, and the colour is caused by the presence of iron within the Quartz.
