Basic illustration of measuring for Specific Gravity. Image courtesy of University of Walkato in New Zealand.
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Recent News
- Pittsburgh to Host National Money Show in March November 17, 2018
- Legend Rare Coin Auctions Regency Auction 29 was a great success given the choppiness of the market November 17, 2018
- United States Mint Rolls Out Final America the Beautiful Quarters® Program Coin of 2018 November 16, 2018
- PCGS Thanks Don Willis For A Decade of Service November 16, 2018
- ANA Coin Press Offers Original Numismatic Content November 16, 2018
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