000 00284nam a2200109Ia 4500
008 250217s9999 xx 000 0 und d
022 _a234931
082 _a553.805
_bJOU
245 4 _aThe Journal of Gemmology
260 _bThe Gemmological Association
_aGreat Britain
942 _cPRBP
999 _c189855
_d189854