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What is a Natural Gemstone? - SOSNA Gems
Gemstone Basics

What is a Natural Gemstone?

A natural gemstone carries the Earth’s story. Learn how to recognize true natural gems, which treatments are accepted, and why authenticity matters.

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Carats Explained – ct vs K (Why a Carat Isn’t Always the Same) - SOSNA Gems
Gemstone Basics

Carats Explained – ct vs K (Why a Carat Isn’t Always the Same)

Carat can mean two very different things: ct for gemstone weight and K for gold purity. Learn the difference, discover practical tips, and avoid common mistakes.

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