My cat does not think my time is well spent taking mineral pictures. He has food, I swear! Big black rock from Franklin, New Jersey is shot through with crystals of willemite (green under UV), calcite (orange-ish), and franklinite (no color under UV, but an important ore of zinc!)

Petroleum inclusions in quartz have an eerie glow under UV, and I just think everyone should know that. (Wait for it)