Gem Identification - Specific Gravity Made Easy

A simple method to measure the specific gravity of stones. Tourmaline, Obsidian and Onyx.

• #education
• #specific_gravity_dimension
• #gemstone
• #gem_identification_specific_gravity_measurement
• #gem_identification
• #specific_gravity
• #how_to_tell_the_difference_between_tourmaline_obsidian_and_onyx
• #how_to_measure_specific_gravity_in_gemstones
• #gemstone_specific_gravity
• #crystal_identification
• #specific_gravity_tutorial
• #gemmology
• #tutorial
• #gemmology_tutorial
• #how_to_test_specific_gravity