carved into a heart — 270 million years of geology in a classic form

Its locality-specific rarity gives it standing among serious crystal collectors

smooth enough to hold without thinking about it

Three blue minerals from three different families—each one blue for a different reason

Black Tourmaline Point Polished Bell Rock carved into a heart —A polished point cut from one of the most electrically active minerals knownTourmaline generates a measurable charge when compressed or heated. Black Tourmaline (Schorl) is a boron silicate, Mohs 77. 5, and a genuinely piezoelectric and pyroelectric mineral: it generates an electric charge under mechanical pressure and temperature change, a property applied in pressure gauges and other scientific instruments. Its black color reflects high iron