Gemstones -

Colour. Colour is the main feature of a gemstone, which exudes beauty and rarity. Gemstones need to possess three characteristics:

: A broad category for all other stones, including Amethyst , Topaz , and Opal . Organic Gems : Non-minerals like Amber , Pearl , and Jet . The "4 Cs" of Gemstone Value GEMSTONES

: Many gems are heat-treated to enhance color (e.g., Aquamarine and Ruby). These treatments are generally permanent but can make stones more brittle. Colour

While the 4 Cs are famously used for diamonds, they apply differently to colored stones where is the most critical factor. Organic Gems : Non-minerals like Amber , Pearl , and Jet

Gemstones are mineral crystals or organic materials prized for their beauty, durability, and rarity. Whether you are a collector, buyer, or hobbyist, understanding the different varieties and value factors is essential. Core Classifications Historically, gems were split into two main groups:

Gemstone Buying Guide - The National Association of Jewellers

: These include Diamond , Ruby , Sapphire , and Emerald .