| Substance | Abbreviation | Systematics | Provings |
| Quarzum fumosum Smoky quartz |
Quarz-f | Oxida trigonala |
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| Quarzum immersion Rock Crystal, Clear quartz |
Quartz-imm | Oxida trigonala |
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| Quarzum purum Rock Crystal, Clear quartz |
Quartz | Oxida trigonala Silicium |
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| Quarzum roseum Rose quartz |
Quarz-r | Oxida trigonala Silicium |
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| Quassia amara/ Picrasma excelsa Quassia Wood |
Quas | Simaroubaceae |
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| Quercus robur e glandibus Common Oak /acorns |
Querc-r | Fagaceae |
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