A coin's history and condition impact its value. While most silver and gold coins are scored using a standard classification, additional grading scales are necessary for unique situations, like the shipwreck effect. Here's a closer look at what the grading system means and how it works.
What Is the Shipwreck Effect?
Coin collectors rely on professional grading scales to determine the value of each piece in their collection. However, metal submerged in water for a long period ages differently than standard pieces in circulation. To compensate for such differences during the appraisal process, coins recovered from shipwrecks are graded by a separate scale than traditional variations.
The shipwreck effect rating is used for both silver and gold coins. However, gold is far less affected by salt water than silver because of the material's composition, so gold pieces don't always require the special grading scale. On the other hand, silver coins are highly affected by saltwater, so it's far more challenging to identify their condition before a shipwreck.
What Are the Grading Standards?
Shipwreck effect coins are sorted into four categories—A, B, C, and general—that highlight the piece's condition after submersion. A general "shipwreck effect" label is used to identify coins with severe metal loss that inhibits a thorough evaluation. On the other end of the spectrum, coins in category A showcase limited wear and top-notch aesthetic appeal.
Along with water-related wear, additional grades are given to coins in categories A through C to distinguish each coin's surface state before entering the water. These grades range from UNC, an uncirculated coin in mint condition, to G (good). Furthermore, a "genuine" label is used to designate silver and gold coins with official documentation of involvement in a shipwreck.
Whether you have a shipwreck effect silver or gold coin or want to add one to your collection, head to Hawaiian Islands Stamp & Coin for expert assistance. Serving Honolulu since 1973, the skilled team offers dependable appraisal services along with an impressive inventory of unique coins. They also buy gold and old coins. Learn more about their selection online, or request more information regarding their appraisal services at (808) 531-6251.