Figures 1-20. Quartz and Opal.
1. Grey and White Striped Flint
2. Carnelian
3. Fortification Agate
4. Clouded Agate
5. Puddingstone or Quartz Conglomerate
6. Vitrified Tube
7. Wood Opal
8. Chrysoprase
9. Black and White Marked Agate
10. Black Ribbon Agate
11. Dark Brown Ribbon Agate
12. Horny-Coloured Agate
13. Sardonyx or Sard
14. Onyx
15. Red Dotted Agate
16. Brecciated Agate
17. Red Striped Agate
18. Variegated Striped Agate
19. Precious Opal
20. Green Opal

This hand-colored plate is part of the first edition English translation of the German Das Mineralreich in Bildern. The publication consists of two sections; the first is an introduction including topics such as the formation of crystals and chemical reactions of crystals; the second is devoted to the description of various mineral groups including precious stones, hornblende and augitic minerals, felspathic minerals, micaceous minerals, zeolitic minerals, calcareous minerals, and various salts and compounds. The final pages of the book contain twenty-four lithograph plates depicting crystalline structures and mineral forms. The first two plates are labeled A and B and the remaining plates are numbered I through XXII. The plates are hand-colored, using metallic finishes to create a lustrous effect.