GEM : A flawless specimen without chips, scars or healed marks, colorfull and live taken
F+++/GEM : Specimen with hardly noticiable natural irregularities, still a high quality shell
F+++ : Specimen with soft growth line not harming the beauty, also flawless and of a high quality
F++ : Specimen present some scars or minor defects or chips, still acceptable quality shell
F : Poor quality specimen, scars and chips are present, most often dead collected |
