This page gathers the stones in our collection accompanied by a report from LOTUS Gemology, the independent Bangkok laboratory known for its work in coloured stone identification and for the clarity of its report language. A LOTUS report documents the species and variety of the gem, its measurements and weight, a description of colour, and — where the evidence supports it — an opinion on geographic origin and a statement on detected treatment.
The varieties represented here are Mozambique Ruby, Rubellite Tourmaline and Tanzanite. Each raises a different question for the buyer. With ruby, the two points that most shape character and price are the origin opinion and whether heat has been applied; both are addressed on the report. With rubellite, the pink to red colour arises from manganese, and the practical considerations are clarity and how well the cutter has handled the material's typical inclusions. With tanzanite, a gem variety of zoisite, the trichroic behaviour means orientation and cut determine how much blue or violet you see face-up.
Read the report alongside the stone itself: documentation confirms identity, but the eye judges life and colour.