Since 1937, Winsa has been sourcing and supplying exceptional natural gemstones from some of the world's most renowned mining regions. For nearly nine decades, our dedication to quality and provenance has connected the source of the earth's finest coloured stones directly with jewellers, designers, and collectors around the world.

Our journey spans the gem-rich landscapes of Africa, from the sapphire fields of Nigeria and Tanzania to the tourmaline and sapphire deposits of Malawi, the vivid gem terrains of Madagascar, and the ruby and sapphire mines of Mozambique. It also reaches Sri Lanka, historically home to some of the world's finest sapphires. With a presence in London, we bring generations of gemstone expertise to one of the world's leading gem trading centres, with the standards and trust that come with it.

Almost a century in this industry has taught us that trust is built stone by stone. Every gem we offer reflects our commitment to authenticity, ethical sourcing, and uncompromising quality. These values have guided Winsa since the beginning, and they now shape our next chapter. Building on our heritage as gemstone specialists, we are bringing our expertise into fine jewellery, creating pieces that let our stones shine in settings worthy of them.