Month: June 2014

Diamond Market – July/August 2014

A slow summer and moderate demand for diamonds. Some fancies selling well but pear and princess sales are flat. GIA grading reports still greatest demand but report times are weeks to months out due to backlog. IDMA warns…

The Gems of East Africa

“If I know a song of Africa, of the giraffe and the African new moon lying on her back, of the plows in the fields and the sweaty faces of the coffee pickers, does Africa…

Diamond Cut Quality Trends

It was 1985 when we first started to report diamond prices in the GemGuide (1982 was the initial start of the publication, then known as The Guide, but did not include diamonds until later). Back…

Duo Valuation of an Unusual Ruby

The use of pricing adjustments is relatively common, especially when the appraiser is using the cost approach. However, in assignments where the subject property falls outside of the core range of trading for that variety…

Rhodochrosite

Rhodochrosite is manganese carbonate (MnCO3). It forms a solid solution series with siderite (FeCO3) with iron substitution and with calcite (CaCO3) with calcium substitution. The name is from the Greek meaning “rose colored.” Rhodochrosite is…