WeRead Powered by ReaderPub
The Pearl, its story, its charm, and its value cover

The Pearl, its story, its charm, and its value

Chapter 20: GENERAL CHARACTERISTICS OF PEARLS AND SHELLS FROM THE VARIOUS FISHERIES
Open in WeRead

Explore more books like this:

About This Book

The text traces pearls from their formation in marine mollusks through harvesting techniques and the fisheries that supply them. It explains varietal distinctions—shape, color, and imperfections—and how these factors influence valuation, with discussion of market prices and merchant practices. Historical, traditional, and superstitious associations are gathered alongside accounts of notable owners and illustrated society portraits. Practical guidance addresses detection of imitations and doctored gems, while summaries of microscopic and observational research outline contemporary understandings of pearl genesis. Appendices provide a glossary, comparative shell characteristics, and practical notes for buyers and collectors.

GENERAL CHARACTERISTICS OF PEARLS AND SHELLS FROM THE VARIOUS FISHERIES

Arabian Sea.—Pearls have fine orient, but the color inclines to yellow.

Shells are larger than those of Ceylon but of little value for mother-of-pearl: iridescent, black-edge m. of p.; known as Lingahs.

Aroe.—Pearls usually good orient; many of irregular shape.

Shells are of medium size, black-edge and iridescent.

Auckland.—Pearls white, but not remarkable for luster.

Shells, medium size, black-edge m. of p.

Australia.—Pearls of Australia generally are of good color, but not as lustrous as those of other sections.

Shells usually large and heavy and the nacre is white.

Bandas.—Pearls good.

Shells are small but heavy and good; black to greenish edge nacre.

Ceylon.—Pearls average finest in the world for orient and color.

Shells, small and valueless for m. of p.

Costa Rica.—Pearls good average.

Shells, medium size, greenish yellow edge.

Egyptian (Red Sea).—Pearls good but run yellow.

Shells, medium size and nacre has greenish edge.

Fiji.—Practically the same as the Bandas.

Gambier.—Pearls good, many fancy colors.

Shells, large, fine nacre with very black edge.

Haiti.—Pearls fine, shells good.

Manilla.—(Includes Batjan, Bima, Ceram, Salawatti, Sooloo, etc.) Pearls, good color and orient.

Shells, large, good, yellow edge nacre.

Merguian Archipelago.—Pearls and shells similar to the Manillas.

Mexico and Panama.—Pearls fair; blacks, grays and fancy colors often fine.

Shells, medium size: nacre has greenish edge.

South Sea Islands.—Pearls usually fine.

Shells generally large, heavy and fine black edge m. of p.

Venezuela.—Pearls, good luster and color—many fine baroques.

Shells: small, beautifully iridescent, but valueless.

Pearls.

Hardness, 3.5-4         Sp. Gr., 1.59-1.62

Composition.

Carbonate of Lime     91.72
Organic matter     5.94
Water     2.34