Watch a gemcutter work with fluorescent green hyalite opal

Steve Moriarty of works with designer Christopher Michael to create beautiful faceted gemstones, like this hyalite opal that glows under UV light.

Rainbow lattice sunstone is beautiful

This intriguing chunk of feldspar looks like ribbon confetti neatly arranged in resin. According to this site, Rainbow lattice sunstone "contains crystallographically oriented exsolutions of Illmenite & Hematite that forms a criss-cross lattice pattern which produces spectral colour aventurescence in reflected light." In other words, a wizard made it.

"Worlds Largest Emerald" fails to attract bid at auction

Who would pay $1.15m for a 57,500-carat emerald from a guy in an Ed Hardy shirt who admits dying the stone green, and who was arrested last week on unrelated fraud charges? No-one. [Vancouver Sun via Brendan Koerner]