Science ❯ Geology ❯ Mineralogy

Gemology

Diamonds Sapphire Ancient Gemstones Star Sapphires Diamond Types Ammolite Quartz Diamond Characteristics Ruby Characteristics Tourmaline Amethyst Jeremejevite Emerald Formation Gemstone Characteristics Grandidierite Emeralds Sapphires Ruby Quality Opals

Pennsylvania Visitor Finds 3.09-Carat Diamond at Arkansas’ Crater of Diamonds Park

The find highlights the park’s rare policy that lets visitors keep any gems they unearth.

Myanmar Unveils 11,000-Carat Ruby Found Near Mogok

Study Pinpoints Nanoscale Structure Behind Ammolite's Vivid Colors

Oklahoma Family Finds 2.79-Carat Brown Diamond at Arkansas’ Crater of Diamonds