This page gathers the stones in our collection whose recorded origin is Congo. Every gem here belongs to the tourmaline family, and the selection spans green, pink, orange, bi-colour and mixed tourmaline — a range that reflects how readily this mineral group accommodates different trace elements within a single crystal structure.
Tourmaline owes its breadth of colour to chemistry: iron and related elements tend to give rise to green tones, while manganese is associated with pinks and warmer oranges. Where the chemistry of the growth environment shifted while the crystal was forming, distinct zones of colour can appear in one stone, which is what produces bi-colour material. Mixed parcels bring several of these hues together.
When choosing between them, weigh the saturation and evenness of colour first, then clarity and the quality of the cut. Tourmaline is strongly pleochroic, so the cutter's orientation of the table influences the face-up colour considerably. For bi-colour stones, consider how cleanly the colour boundary reads and whether it suits the setting you have in mind.
