Most natural sapphires have "silk" (tiny inclusions). Aim for "eye-clean" stones; completely flawless stones are extremely rare and suspicious. Medium
Prices per carat increase exponentially with size. For example, a 10ct unheated vivid blue stone can exceed $50,000. Sapphire 4Cs | Determining Value in Sapphires buy blue sapphire stone online
Avoid "windowing" (where you can see through the stone's center) or "deep bellies" that hide weight without adding visual size. Variable Most natural sapphires have "silk" (tiny inclusions)
Look for medium to medium-dark tones with vivid saturation. Pure blue commands a premium over stones with secondary green or purple tints. Medium collectors prioritize and third-party certification .
When shopping online, color is the primary driver of value, typically accounting for 60%–80% of a sapphire's valuation. In the 2026 market, collectors prioritize and third-party certification .