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

                                                                                                                                                                                                                                                                                                           

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