Dumortierite in Quartz Cabochon | 23.4x10mm, 9.27ct | Brazil | QU556
Dumortierite in Quartz Cabochon | 23.4x10mm, 9.27ct | Brazil | QU556
This cabochon has an unusual form: the dumortierite inclusion sits as a half circle within the quartz, with a flat bottom and a rough, drusy top rather than a polished dome. The contrast between the clear quartz body and the blue dumortierite mass gives the stone a distinctly architectural quality.
DIMENSIONS
Size: 23.4mm x 10mm x 5mm
Weight: 9.27 ct
STONE DETAILS
Variety: Dumortierite in Quartz
Species: Quartz
Origin: Brazil
Cut: Cabochon
Treatment: None
Hardness: 7 Mohs
RI: 1.544 – 1.553
Dumortierite in quartz is an inclusion material rather than a mineral replacement - the blue aluminum borosilicate mineral forms fibrous or massive concentrations within a quartz host, and the patterning it creates is never repeated twice. Brazilian material tends toward rich, saturated blue inclusions with good contrast against the quartz, which makes it particularly useful for designers working with statement pieces where the internal geometry can be treated as part of the composition. Quartz itself is practical to work with: no cleavage, good toughness, and no special sensitivity to the heat or chemicals common in a jewelry studio.
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