Shells quality grading  

In our listings we use the HMS-ISGS grading system. A plus (+) sign after a grading means that it is in between that grade and the above grade. A plus-plus (++) after a grading means that it could possibly be included in the above grade. Other abbreviations used: w/o – with operculum; w/p – with periostracum

 

There is however an exception. We only use the GEM grade for Cypraeidae, Marginellidae, Olividae and Ovulidae. For all other families we use F++, which means that the really GEM shells are also included in this denomination.


All shells are live taken, unless otherwise specified.

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