TanzaniteOne Mining Limited , a fully owned subsidiary of Richland Resources Ltd listed on the AIM (RLD), is the world's largest and most scientifically advanced extractor and supplier of rough Tanzanite.
Our unique position allows us to support and influence the entire Tanzanite chain, from mine to market.

Our company vision is to continue being the world’s leading Tanzanite Mining Company.
This requires constant evaluation and improvement of processes to ensure safety, profitability and social responsibility.

Our success is based on a foundation of being:

• Conflict Free. Our Tanzanite is obtained following established labour laws, without the use of child labour or violence and in a way that minimises environmental impact.
• The Industry Leader. TanzaniteOne owns the licence to mine Block C, the world's largest commercial Tanzanite mining facility. This state-of-the-art operation produces a consistent, cost effective and high quality supply of gemstones.
• Prestigious. TanzaniteOne’s rough stones are sold to only eight, high status 'Sightholder' companies worldwide.
• Most Beautiful. Our onsite polishing facility produces truly brilliant Tanzanite. Calibrated stones are cut to proportions that showcase each gemstone’s exceptional beauty.