Index
A [B] C [D] [E] F G H I J [K] L [M] N O [P] Q R [S] T [U] V [W] X Y [Z]
A actinolite: [26] agate: [20], [28], [38] agatized wood: [27] allanite: [21] almandite: [22] amazonite: [23] amazon stone: [23] amber: [18] amethyst: [25] Amethyst Hill: [25] amorphous gemstones: [9] andalusite: [30] Arkansas: [19] Armstrong County: [21] augite: [18], [28]
B Baringer Hill, Llano County: [21], [26] baroque pearls and/or stones: [17], [25] bediasite (tektite): [28]-29, [39] beryl: [18] Big Bend National Park: [27] biotite: [23] Blanco County: [18], [22] Brazos County: [29] Brazos River: [25] Brewster County: [18], [23], [24], [25], [26], [27], [28], [31], [36] brilliancy: [5] brilliant cut, standard American: [13], [15], [16] Brown County: [19] Burleson County: [29] Burnet County: [20], [22], [23], [25], [26], [30], [37]
C cabochon gems: [10]-12 Caddo Lake: [25] carbuncle: [22] carnelian: [27] cassiterite: [23], [29] celestite: [19], [35] chalcedony: [27] geodes: [26] chuck: [15], [17] citrine: [25]-26 cleavage: [6], [13] coal: [22] Coke County: [19] color: [5] Colorado River: [25] Concho River: [25] crown girdle facets: [16], [17] crown of gemstone: [15], [16] crystals: [7]-9 crystal systems: [7] crytolite: [21] Culberson County: [22], [23], [25], [26], [31] culet: [13] cutting and polishing: [10]-17 cutting lap: [13]
D DeWitt County: [29] diamond: [19] saw: [10], [11] diaphaneity: [5] dispersion: [6] dopping: [12], [13] dop-stick: [12], [15], [17] dop-wax: [12], [15], [17] dravite: [30] durability: [6] Duval County: [21], [24]
E El Paso County: [22], [30], [31] emerald cut: [15] epidote: [19]-20
F facet, kinds of: [13] main: [16] skill: [16] table: [13], [14] faceted gems and/or stones: [10], [13]-17 Fayette County: [20], [29] fergusonite: [21] fire: [5] Fisher County: [19] fluorite: [20], [21] Foard County: [19] fossil wood: [20]-21, [22] fracture: [6] Franklin Mountains: [18]
G gadolinite: [21]-22 garnet: [20], [22], [36] gemstones, by kinds: [18]-31 geodes, celestite: [19] Georgia: [29] Gillespie County: [18], [22], [23], [25], [26], [30], [36] girdle facets: [16] gneiss: [22] Gonzales County: [20], [29] grain: [25] gram: [7] graphite: [30] Grimes County: [29] grinding: [12] Guadalupe River: [25] Gulf Coast: [25] Gulf Coastal Plain: [18], [20], [22], [35]
H hardness: [6] Hudspeth County: [18], [20], [22], [24], [25], [26], [27], [28], [31]
I index of refraction: [5]
J jasper: [27]-28 Jeff Davis County: [26], [27], [28], [31] jet: [22]
K Kinney County: [28]
L labradorite: [23], [36] Lake Buchanan: [21] Lampasas County: [19] lap plate: [13] Lavaca County: [29] Lee County: [20], [29] lignite: [22] Live Oak County: [21] Llano County: [18], [19], [20], [21], [22], [23], [25], [26], [30], [31], [40] Llano River: [25] luster: [5]
M Madeira topaz: [29] Mason County: [20], [22], [23], [26], [29], [30], [39], [40] Massachusetts: [29] Maverick County: [18] microcline: [20], [21], [23]-24, [29], [37] Mohs scale of hardness: [6] moonstone: [28] Mount Bonnell: [19] muscovite: [23]
N natural glass: [18], [24], [28] Needle Peak, Presidio County: [27] nivenite: [21] Nolan County: [19] Nueces River: [25]
O obsidian: [24], [29] Oklahoma: [29] opal: [20], [24] opalized wood: [35] orbicular jasper: [28] ounce: [7]
P Packsaddle Mountain: [23] Packsaddle schist: [30] palm wood: [21], [35] Palo Duro Canyon: [21] pavilion: [13], [16] facets: [16] girdle facets: [16], [17] pearl: [24]-25 pegmatites and/or pegmatite dikes: [18], [20], [21], [22], [23], [26], [29], [39] petrified wood: [26] phantom crystals: [26] pistacite: [20] pleochroism: [5] point: [7] polishing: [17] lap: [13], [16] preformed stone: [16] preforming: [15] Presidio County: [20], [22], [24], [25], [26], [27], [28] properties of gemstones: [5]-7
Q quartz: [20], [21], [23], [25]-28, [29], [30] smoky: [38]
R radioactive elements: [22] radioactivity of gadolinite: [21] rarity: [6] Reeves County: [26], [27] Rio Grande: [25] gravels of: [21], [27], [38] Valley: [27] rock crystal: [26] rose quartz: [26]
S Sabine River: [25] sanding: [12] sanidine: [28] sawing: [10] scheelite: [20] schorl: [30] size: [7] “skill” facets: [16] “slab” of gem materials: [11] Smithsonian Institution: [21] smoky quartz: [23], [26], [37] smoky topaz: [29] Spanish topaz: [29] specific gravity: [7] spinel: [18], [28] star facets: [17] step cut: [15] streak: [6] synthetic gems: [7]
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]