: Beginners can start by observing luster , transparency , and hardness .
: Most gems can be cleaned with mild soap and water. However, porous stones like Opal and Pearl require specialized care to avoid damage. Gemstone Buying Guide - Gemfields GEMSTONES
Colour. Colour is the main feature of a gemstone, which exudes beauty and rarity. Gemstones need to possess three characteristics: : Beginners can start by observing luster ,