- Figures— Page
- 1. Typical crystal form of three common Texas gemstones 9
- 2. Variations of the cabochon cut 10
- 3. Diamond saw 11
- 4. Cabochon properly attached to dop-stick 12
- 5. Cabochons at various stages of cutting and polishing 12
- 6. Nomenclature of the standard American brilliant cut 13
- 7. Facet table 14
- 8. Grinding the table facet on a rough stone 15
- 9. Stone dopped to table facet 15
- 10. Preformed stone dopped to table facet 16
- 11. Proper sequence of cutting of the pavilion facets 16
- 12. Proper placing of pavilion girdle facets 17
- 13. Proper sequence of cutting of crown facets 17
- 14. Common crystal form of Travis County celestite 19
- 15. Common crystal form of fluorite 20
- 16. Crystal faces on microcline specimen shown in Plate III 23
- 17. Common crystal form of spinel 28
- 18. Crystal faces on topaz crystal shown in Plate V 29
- 19. Cross section through irregularly colored stone 30
- 20. Common crystal form of Llano County tourmaline 31
- Plates— Page
- I. A, Gem-quality celestite crystals from Travis County. B, Opalized wood from the Texas Gulf Coastal Plain 35
- II. A, Gem-quality garnet crystals and faceted gem from Gillespie County. B, Labradorite from Brewster County 36
- III. A, Pink microcline crystal. B, Smoky quartz. Both from Burnet County 37
- IV. Polished agate from gravels of the Rio Grande near Zapata, Zapata County 38
- V. A, Texas tektites (bediasites). B, Topaz crystal from a pegmatite dike near Streeter, Mason County 39
- VI. A, Topaz from stream gravels near Streeter, Mason County. B, Tourmaline crystals in schist from Llano County 40
- Table 1. Properties of some common Texas gem minerals 8
Texas Gemstones ELBERT A. KING, JR.
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