Rutilated Quartz
Image: <bdi><a href="https://www.wikidata.org/wiki/Q56247090" class="extiw" title="d:Q56247090"><span title="mineral collector and dealer">Robert M. Lavinsky</span></a></bdi> (CC BY-SA 3.0)
Mineral NameRutilated Quartz
Chemical FormulaSiO2 (with TiO2 inclusions)
Mohs Hardness7
Crystal Systemtrigonal
Lustervitreous
Streak Colorwhite
Cleavagenone
Fractureconchoidal
Specific Gravity2.65
Colorsdark brown, smoky, golden-brown
Transparencytransparent
Type LocalityNovo Horizonte, Bahia, Northeast Region, Brazil
Mineral GroupSilicates
Usesjewelry, collector, metaphysical
Associated Mineralsrutile
Rarityuncommon
Description
This is a transparent to translucent, dark smoky quartz crystal exhibiting well-formed faces and containing abundant, fine, needle-like inclusions of golden-brown rutile throughout its body.
Geological Context
Rutilated quartz typically forms in hydrothermal veins or pegmatites where quartz crystallizes around pre-existing rutile needles, often in environments with high temperatures and pressures.
