T table facet: [13], [15] tektite (bediasite): [28]-29, [39] tenacity: [6] thorogummite: [21] topaz: [23], [26], [29]-30, [39], [40] quartz: [29] tourmaline: [26], [29], [30]-31, [40] Town Mountain, Llano County: [26], [30] transparency: [6] Travis County: [19], [35] Trinity River: [25] tumbled gems: [17] turquoise: [31]
U U. S. National Museum: [30]
V value of gemstones: [6], [7] Val Verde County: [24] valverdites: [24] Van Horn, Hudspeth County: [27]
W Walker County: [29] Washington County: [20] Webb County: [21] weight, units of: [7], [25]
Z Zapata County: [38]
Transcriber’s Notes
- Silently corrected a few typos.
- Renumbered figures 6 and 7 (and references to them) to correspond to their order in the printed book.
- Retained publication information from the printed edition: this eBook is public-domain in the country of publication.
- In the text versions only, text in italics is delimited by _underscores_.