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Há 5 dias · Trapiche Gems. Wim Vertriest. Download PDF. Figure 1. A pair of trapiche emerald slices from Colombia, 10.92 carats total. Photo by Kevin Schumacher; courtesy of Mayer & Watt. Jeffery Bergman is known in the trade as a collector of trapiche gems. These gems, characterized by their six-rayed patterns, are elusive and seldom found in high quality.
Há 5 dias · Peridot History and Lore. This 146.10-carat peridot is in the collection of the Natural History Museum in London. Peridot has always been associated with light. In fact, the Egyptians called it the “gem of the sun.”. Some believed that it protected its owner from “terrors of the night,” especially when it was set in gold.
Há 1 dia · Understanding the Color Scale: Diamond color grading is based on a scale that ranges from D (colorless) to Z (light yellow or brown). Diamonds that fall within the D to F range are considered colorless or near colorless and are highly prized for their purity and brilliance. As you move down the color scale towards Z, the presence of yellow or ...
Há 4 dias · Due to their exceptional reputation, we opt to use Gemological Institute of America (GIA) graded natural center diamonds where possible. The GIA is an international non-profit organisation dedicated to producing consistent, accurate and unbiased grading reports.
Há 13 horas · Bear in mind that commercially available clutch backs can be less than 0.2 mm thick, so it takes little to burr right through them. But very small indents can create secure stops that are safer than even the strongest possible tension between the curled springs.
Há 13 horas · The Gemological Institute of America (GIA) created a diamond grading scale to assess the quality of a diamond based on its cut, colour, clarity, and carat (diamond 4C’s). This scale, now the gold standard, is used to assess the absence of colour in a diamond to determine its colour grade.
Há 13 horas · This is where gemstone certification plays a pivotal role, providing assurance and clarity in the murky waters of the gem trade. In this article, we delve into the realm of gemstone certification, comparing two prominent players: GIA (Gemological Institute of America) and IGI (International Gemological Institute).
