75g Optical Calcite Freeform TC2112 howlite The base is notched so

The base is notched so the lamp can sit flat while the cord runs through the notch

These can serve as a reminder to always challenge oneself to continue learning

Outer Urals

Dimensions: 8x3x2 inches

and as such is typically classified as a mineraloid

75g Optical Calcite Freeform TC2112 howlite The base is notched so75g Optical Calcite Freeform Approx. Dimensions: 1. 5x0. 75x2. 25 inches Approx. Weight: 75 grams Locality: Maharashtra, India Optical calcite is also referred to as Iceland Spar because of its first discovery in Eskifjord, Iceland. It is typically colorless, and exhibits the optical phenomenon of double refraction where an object viewed through the calcite will appear doubled. Double refraction, or birefraction, is also called birefringence and is