Beach at Makauwahi Cave, Kauai, Hawaii
This is a magnetite crystal collected from a strandline on the beach near Makauwahi Cave. When this sand is passed through a #100 US sieve the magnetite crystals dominate. These are crystals that grew in the magma and were freed by erosion over time.
Transmitted Off Crossed Circular Polarized Light and Darkfield Reflected Illumination
