Blog: Coloured gemstones
Diamonds and gemstones: guides to choosing, treatments, care and gemmological news.
12 articles in category “Coloured gemstones” · reset filters
Alexandrite: observing colour change and understanding its limits
Alexandrite can change colour between light sources. Learn how to compare the effect and when identification is required.
Tanzanite in a ring or pendant? A guide to wearing it
Tanzanite has cleavage and needs protection from knocks. Learn how to choose jewellery and which cleaning methods to avoid.
Tanzanite: why it can look blue or violet
Tanzanite colour depends on orientation and lighting. Learn to compare stones and ask about heat treatment.
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