Calcite Crystal - Iceland Spar

Calcite Crystal - Iceland Spar

$6.95
14 points (Points accrued: 0)
Item #: PF-2
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If you look at the words on a printed page through this crystal, you'll see double. These natural, nearly transparent crystals exhibit the property of "birefringence", i.e., they can break light into two distinct polarized beams. By rotating a polarizing filter over the crystal, it is possible to view one image at a time! This is a great hands-on demonstration and wonderful when displayed using an overhead projector. Each crystal is about 2 x 2 x 4 cm.