For over 50 years, Winsa has been sourcing and supplying exceptional natural gemstones from some of the world's most storied mining regions. What began as a dedication to quality and provenance has grown into a global presence, connecting the source of the earth's finest coloured stones directly to the hands of 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 — as well as Sri Lanka, historically home to some of the world's finest sapphires. With a presence in London, we bridge decades of gemstone expertise with the standards and trust of one of the world's leading gem trading centres.
Five decades in this industry have taught us that trust is built stone by stone. Every gem we offer reflects our commitment to authenticity, ethical sourcing, and uncompromising quality — values that have guided Winsa since the beginning and continue to shape everything we do today.