Plate cut from barytes biaxial crystal
Plate cut from dioptase uniaxial crystal
Plate cut from 0.5mm calcite uniaxial crystal
Plate cut from 3mm calcite uniaxial crystal
Plate cut from brucite uniaxial crystal
Plate cut from zircon uniaxial crystal
Plate cut from 1mm calcite uniaxial crystal
Plate cut from anhydrite biaxial crystal
Plate cut from adularia biaxial crystal
Plate cut from left-handed quartz uniaxial crystal
Plate cut from axinite biaxial crystal
Plate cut from 8mm quartz uniaxial crystal
Plate cut from apatite uniaxial crystal
Plate cut from corundum uniaxial crystal
Plate cut from meionite uniaxial crystal
Plate cut from hemitrope calcite uniaxial crystal
Plate cut from aragonite biaxial crystal
Plate cut from apophyllite uniaxial crystal
Plate cut from beryl uniaxial crystal
Plate cut from right-handed quartz uniaxial crystal
Carton of lamp bulbs as used with Polariscope equipment
1955-1970