The Cullinan Diamond, discovered in South Africa in 1905, weighs 3,106 carats and is considered the largest gemstone-quality diamond ever recovered. It was initially speculated that the diamond would ...

“The Winston diamonds are unprecedented in their beauty and rarity, and we are thrilled to welcome them as additions to our National Gem Collection. We extend our gratitude to Ronald Winston for ...

Robak says the mineral and gem industry is always growing and changing, and says current trends include mineral specimen, raw gemstones and specimens, as opposed to beads and rock tumbling and ...