"A REALLY NEAT and showy Bolivian quartz plate with 10 Japan-Law Twin crystals! From the Kami Mine in Bolivia. Twins are recognized by penetration angles or notches in the crystal, mirror planes that do not normally occur on a specific mineral and crystallographic techniques not normally available to the average collector. Twinning often has a dramatic effect on the outward symmetry of the mineral either by raising or lowering the symmetry. Twinning can make an orthorhombic mineral appear hexagonal or make a trigonal mineral appear monoclinic. Even collectors of specific types of minerals must have their respective twins in order to have a "complete" collection." Location: Kami Mine, Cochabamba Dept., Bolivia
Size: 5.5 x 4.6 x 2.5 cm.
Weight: 1.5 lbs.
Quantity Available: 1 Price:
$200.00 |