Blog — diamonds and gemstones
Diamonds and gemstones: guides to choosing, treatments, care and gemmological news.
Choosing a pearl necklace: lustre, matching and care
Lustre and strand harmony matter alongside size. Learn what to observe in pearls and how to protect their delicate surfaces.
Natural pearls, cultured pearls and imitations: three different categories
Cultured pearls are formed by molluscs with human intervention. Understand how they differ from natural pearls and imitations.
Hydrophane opal: why water can temporarily change its appearance
Some opals absorb water and change transparency. Learn what hydrophane means and avoid experiments that may damage jewellery.
Solid opal, doublet or triplet: what are you buying?
An opal can be a single piece or an assembled set of layers. Learn how to read doublet and triplet descriptions correctly.
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.
Caring for an emerald ring without damaging the stone
Emeralds require care around impacts, heat and cleaning. Practical steps for checking the setting, storage and workshop visits.
Oil and resin in emeralds: understanding clarity enhancement
Fracture filling can improve an emerald’s appearance. Learn what this treatment means and what information to keep.
Emerald inclusions: what “jardin” means and when it matters
Many emeralds have visible inclusions. Learn to distinguish characteristic appearance from problems with transparency and durability.
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