OPAL + CHALCEDONY + JASPER (MINING)
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BTQUARTZ, GEMS (MINING)
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UDC622.377.8
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Descriptor GEROPAL + CHALCEDON + JASPIS (BERGBAU)
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Descriptor ENGOPAL + CHALCEDONY + JASPER (MINING)
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Descriptor FREOPALE + CALCEDOINE + JASPE (INDUSTRIE MINIÈRE)
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Variant GEROPAL (BERGBAU)
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Variant GERCHALCEDON (BERGBAU)
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Variant GERJASPIS (BERGBAU)
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Variant ENGOPAL (MINING)
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Variant ENGCHALCEDONY (MINING)
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Variant ENGJASPER (MINING)
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Variant FREOPALE (INDUSTRIE MINIÈRE)
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Variant FRECALCEDOINE (INDUSTRIE MINIÈRE)
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Variant FREJASPE (INDUSTRIE MINIÈRE)