QUARTZ, GEMS (MINING)
-
BTPRECIOUS AND SEMIPRECIOUS STONES + GEMS (MINING)
-
UDC622.377
-
Descriptor GERQUARZ, EDELSTEINE (BERGBAU)
-
Descriptor ENGQUARTZ, GEMS (MINING)
-
Descriptor FREQUARTZ, PIERRES PRECIEUSES (INDUSTRIE MINIÈRE)
-
Variant GERBERGKRISTALL (BERGBAU)
-
Variant ENGROCK CRYSTAL (MINING)
-
Variant FRECRISTAL DE ROCHE (INDUSTRIE MINIÈRE)
-
NTOPAL + CHALCEDONY + JASPER (MINING)