Like other fresh water pearls, Delaware pearl can be used in jewelry.
State Mineral: Sillimanite
Sillimanite was adopted as Delaware's State Mineral in 1977.
Useful Books & Bibliography:
- Beachcomber's Guide from Cape Cod to Cape Hatteras: Marine Life of Massachusetts, Rhode Island, Connecticut, New York, New Jersey, Delaware, Maryland - by Henry C. Keatts
Helpful hints on what to find and look for on Eastern US beaches.
- Fossil Collecting in the Mid-Atlantic States: With Localities, Collecting Tips, and Illustrations of More Than 450 Fossil Specimens - by Jasper Burns
The book contains information on over 45 fossil-collecting sites in Maryland, Delaware, Pennsylvania, Virginia, and West Virginia.
- Gemstones - by Cally Hall
A field guide to gemstones. Nice pictures and good, brief, well-written descriptions of over 130 varieties of gemstones.
- The Curious Lore of Precious Stones - by George Frederick Kunz
The definitive book on fascinating, traditional gem lore. Very practical.
- Gem Identification Made Easy: A Hands-On Guide to More Confident Buying & Selling New 3rd Edition - by Antoinette L. Matlins & Antonio C. Bonanno
This book is really great for knowing he latest gems, synthetics, treatments, and instruments. Easy to use.
- Simon and Schuster's Guide to Gems and Precious Stones - by C. Ciprianai, Kennie Lyman (Editor), Alessando Borelli
This book is one inch thick and every facing page has a full colored photo of gems or precious stones. Hardness, weights, cuts, refractions, and value of color are given for each gem.
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