Diamonds and Coloured Gemstones
The diamond rushes of the last few years have to some extent eclipsed exploration and mine development opportunities in coloured gemstones, the value of which, in some varieties such as emerald, ruby and sapphire, can equal or exceed diamond. Gemstones occur in a wide spectrum of geological environments and are produced from hard rock, residual and alluvial resources which are worked by open pit, dredge and underground mining methods. Our personnel have been involved with diamond and coloured gem projects worldwide over the last twenty years including exploration, mining, cutting and marketing, and have developed contacts which enable us to manage fully integrated projects:

Diamonds

	Field evaluation of alluvial diamond deposits in Guinea, Ghana and Sierra Leone
	Production supervision of an alluvial diamond deposit in South Africa
	Satellite imagery interpretation of palaeo channels in Angola and Brazil
	Field investigation of potentially diamondiferous kimberlites in Sweden
	Mapping, pitting and bulk sampling of terrace alluvials for diamonds in Central African Republic
	Appraisal of kimberlite and alluvial projects in Ontario, Saskatchewan, Michigan and East Africa
	Due diligence review of alluvial and kimberlitic diamond projects in Brazil
	Geological supervision of kimberlite bulk sampling programme in Saskatchewan
	Evaluation of diamond exploration projects in Karelia and Archangel
	Detailed review of a diamond exploration programme in Finland, leading to a successful AIM listing
	Assessment of kimberlite project in Lesotho
	Assessment and 43-101 report on a kimberlite project in Lesotho

Emerald

	Comprehensive geological and mining studies, bulk sampling, core drilling, reserve assessment and development of exploration and production plans for the Gravelotte emerald deposits in South Africa for a successful Stock Exchange listing. This was followed by a three month period of mine geological services to ensure monthly production of 30 kilograms of saleable rough
	Assessment of resource potential of a Zambian emerald mining project
	CPR for AIM listing of an emerald exploration company in Zambia

Sapphire and Ruby

	Historical review, geological and preliminary financial evaluation of the Yogo lode sapphire deposit, Montana USA
	Evaluation of eluvial and hard rock gem corundum deposits in Malawi
	Evaluation of alluvial sapphire deposits in Madagascar

Tanzanite and Tsavorite

Field assessment of the controls of gem mineralisation within graphitic gneisses in East Africa