This page gathers the stones in our collection accompanied by a report from GRS (GemResearch Swisslab), a Swiss gemmological laboratory widely referenced in the coloured stone trade. A GRS report records the essentials a buyer needs: species and variety, weight and measurements, an opinion on geographic origin where determinable, and a statement on detected treatments or the absence of them. GRS is also known for its descriptive colour nomenclature, which places a stone's hue and saturation within a defined framework rather than leaving it to subjective wording.
The varieties you will find here reflect where such documentation matters most. Mozambique Ruby and Padparadscha Sapphire are stones whose value rests heavily on precise colour and on treatment disclosure. Paraiba Tourmaline and Alexandrite are defined by rarity and by identification questions — cuprian chemistry in the former, colour change in the latter — that reward laboratory confirmation. Aquamarine appears here where clarity and colour merit formal record.
When comparing pieces, read the report alongside the stone. Consider how the colour description matches what you see in your own light, what treatment is stated, and whether origin is offered as a conclusion or an opinion.
