Calcite Crystal - Iceland Spar

Polarizing Film Sheet - set of 10, Model: 93493, Gadget & Electronics Store

TV Rock - Ulexite

AITELEI 1Ib Natural White Calcite Crystal Optical Calcite Iceland Spar Mineral Healing Raw Stones Rough Rock Crystals for Tumbling,Cabbing

ONE (1) Beautiful Argonite Stone - Aragonite Cluster - Raw Uncut Aragonite - Rock Paradise Exclusive AM17B9

Optical Calcite (Iceland Spar) Mineral Rock Approx. 5/8-1 Inch - 2 Pieces w Info Card

EISCO High Resolution Quantitative Spectroscope, 400-700 nm, 5nm

MQB Optical Glass Triangular Prism for Teaching Light Spectrum Physics 20mm

Linear Polarization A4 Sheet Polarizer Educational Physics Polarized Filter Optical

EISCO Premium Quantitative Spectroscope, +/- 5nm Accuracy

Amlong Crystal 2.5" Optical Glass Triangular Prism for Teaching Light Spectrum Physics and Photo Photography Prism, 60mm