Lewis Hastings Sarett was a research scientist at one of the largest what, in the world?
Lewis Hastings Sarett Lewis Hastings Sarett (December 22, 1917 – November 29, 1999) was an American organic chemist. While serving as a research scientist at Merck & Co., Inc., synthesized cortisone.
Gemfields Gemfields plc is an AIM-listed multinational natural resources company headquartered in London, United Kingdom, and is one of the world's leading supplier of responsibly sourced coloured gemstones. The company specializes in the mining, processing and sale of coloured gemstones, in particular emeralds, rubies and amethysts. The group owns the "Kagem" emerald mine in Zambia, the single largest emerald mine in the world, the "Montepuez" ruby deposit in Mozambique, the most significant ruby deposit in the world, and the "Kariba" amethyst mine in Zambia. Gemfields produces around 25% of the world’s emerald supply and 70% of the world's ruby supply.