top quality a grade small rough ruby crystals from tanzania on crystalline druzy center of polished blue lace agate slab

agate aluminum amplifier blue brazil bright center chakra channeling class corundum crystal crystalline crystals druzy esoteric gem gemology gemstone geode geological geology grade healing heart hydroxides jewel jewelry lace love mineral mineralogy mountain natural oxide partially polished powerful precious protection quality quartz raw red rock root rough ruby semiprecious shiny slab small specimen spiritual stone system tanzania top translucent transparent trigonal