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6 cze 2014 · THE GIA 7 PEARL VALUE FACTORS™ AND WHAT TO LOOK FOR PEARL ˜ SHAPE Pearls come in seven basic shapes: round, near-round, oval, button, drop, semi-baroque, and baroque. Perfectly spherical pearls and symmetrical drops are the most valued. There are exceptions, though. Well-formed oval or baroque cultured pearls are also prized by pearl lovers.
- Pearl Classification: The GIA 7 Pearl Value Factors
This wall chart is intended as a comprehensive but...
- Pearl Classification: The GIA 7 Pearl Value Factors
6 kwi 2024 · Tahitian Pearls – Sometimes called "black pearls," these actually come in a range of exotic colors from silver and gray to deep purple or green. They are quite large from 8mm-18mm and prized for their unique dark luster.
In general, there’re 7 factors that affect the pearl value: shape, size, colour, lustre, surface quality, nacre quality and matching. Like the 4Cs of diamond valuation, the pearl’s 7 value factors are created by the Gemological Institute of America (GIA) to standardise pearl grading systems.
You’ll just need to follow the 80-20 pareto principle and gain a basic understanding of the most widely accepted pearl grading system; A-AAAA grading system, A-AAA grading system and the A-D Grading Scale. And this simple guide will teach you just that.
26 sty 2018 · This wall chart is intended as a comprehensive but simplified overview of how GIA gemologists classify pearls using the GIA 7 Pearl Value Factors system (see figure 2, for example).
Naturally colored pearls like black Tahitian pearls or Golden South Sea pearls are graded on their color’s depth and saturation - the more strongly colored pearls will be more rare and valuable. Certain overtones or exotic body colors command premium pricing at auctions.
the value of pearls GEMGUIDE - 8 - MAY / JUNE 2022 Gemworld International, Inc., 2640 Patriot Blvd, Suite 240, Glenview, IL 60026-8075, www.gemguide.com
