Raw Kyanite Cluster, Brazil

Raw kyanite cluster for sale

This raw kyanite cluster for sale is a mass of blue kyanite blades packed together, with pale tan rock between them, left unpolished. It gets its price at the drop, and the list sees it before anyone else.

Why kyanite has two hardnesses

Kyanite has two hardnesses: about 4.5 to 5 along the length of a blade and 6.5 to 7 across it. A steel knife can scratch a blade lengthwise but not crosswise, because the crystal structure holds together more strongly in one direction. Its old name, disthene, comes from the Greek for "two strengths." The name kyanite comes from the Greek kyanos, "dark blue," and the blue comes from traces of iron and titanium. More in the kyanite guide.

Where this kyanite comes from

This kyanite comes from Brazil, the locality on its label. Kyanite grows when clay-rich rock is buried deep and squeezed until it recrystallizes as schist or gneiss, so geologists read it as a sign of high pressure.

Raw kyanite care

Raw kyanite care starts with the soft direction: quartz and other harder stones can scratch a blade along its length, so give it a spot of its own. The blades also split easily lengthwise, so lift it by the rock, not the blades, and use a soft dry brush for dust.

How this raw kyanite cluster ships

This raw kyanite cluster ships from Denver, Colorado, and US shipping is free on orders over $75. You can cancel any time before it ships.