Black Tourmaline Crystal Pyramid Pyrite The plainest stones in the

The plainest stones in the range

large enough to contain ash from sustained burns

scaled down and finer for the smoke-tool format

This Q2 formation geode from Uruguay combines a tall profile with an open crystal face and textured natural edges

The colour is the reason to want it - pale aqua to deep teal

Black Tourmaline Crystal Pyramid Pyrite The plainest stones in theBlack tourmaline a dense, true black cut to four faces and an apex, marked with fine lengthwise grooves: schorl, one of the most chemically complex minerals cut as a stone. From Brazil, a pyramid. It is schorl, a sodium iron rich tourmaline, one of the most complex borosilicate minerals known, its formula running to a dozen elements; iron gives the deep black. Harder than quartz at Mohs 77. 5, with fine striations that often survive the polish.