galena spinel law twinned crystals with quartz crystals source
(via tucson2012-5)
Cuprite on Copper~Poteryaevskoe Mine, Rubtsovskoe deposit, Siberia, Russia source
yum! such a sick piece of fluorescent fluorite~Rogerley Mine, Frosterley, Country Durham, United Kingdom. more pics here
Native Gold on Quartz~Harvard Mine, Jamestown, California (source)
Calcite showing oriented growth faces~Wessels Mine, Kalahari Manganese Fields, South Africa source
juicy bicolored sapphire/ruby crystal~Winza, Mpwapwa district, Dodoma region, Tanzania (source)
Danburite from Madagascar