Fundamentals of Gemstone Valuation and Handling

University:
Massachusetts Institute of Technology
Course:
3.11 | Mechanics of Materials
Academic year:

2021
Views:

227

Pages:

1
Author:

rehinhea0c

KEY CONCEPTS Large gems are more rare than small ones, so they often cost much more per carat, even if they’re of equivalent quality. Dealers routinely use sieves to sort large lots of small, round gems into same-size parcels. Most colored stones are sold by weight. The biggest-selling calibrated colored stone shapes are rounds and ovals. A gem’s recorded carat weight and dimensions can help identify it later. A millimeter gauge is one of a stone dealer’s most useful and versatile tools. Presentation is essential to making your stones look their best. Successful dealers stock the range and quality of gems their customers need. The sizes of calibrated gems in a parcel should be within 0.10 mm of each other. Key Terms Consignment—A selection of goods loaned to a dealer by another wholesaler or a gem cutter. Matching tray—A grooved, neutrally colored, nonreflective tray used to match sets of stones. Memo—Buying agreement where a dealer entrusts merchandise to a client for inspection and approval without requiring immediate payment. Metric carat—The international unit of measurement for gem weight (1 carat equals 0.20 gram). Point—One one-hundredth of a carat (0.01 ct.). Scoop—A small shovel made of thin metal, used for picking up gems. Sieve set—Set of circular plates, each punched with precisely sized holes, used to sort small, round gems by size. Sorting pad—A neutrally colored paper pad on which dealers sort and show gems. Unit price—The price per piece. Per-carat price—The price of a gem divided by its carat weight.

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