Group 4 - Oxides and Hydroxides
ⓘ	Quartz var. Agate	4.DA.05	SiO₂
ⓘ	var. Amethyst	4.DA.05	SiO₂
ⓘ	var. Chalcedony	4.DA.05	SiO₂
ⓘ	var. Citrine	4.DA.05	SiO₂
ⓘ	var. Moss Agate	4.DA.05	SiO₂
ⓘ		4.DA.05	SiO₂
ⓘ	var. Eye Agate	4.DA.05	SiO₂
ⓘ	var. Fortification Agate	4.DA.05	SiO₂
ⓘ	var. Iris Agate	4.DA.05	SiO₂
ⓘ	var. Carnelian	4.DA.05	SiO₂
ⓘ	var. Plume Agate	4.DA.05	SiO₂
ⓘ	Opal	4.DA.10	SiO₂ · nH₂O
ⓘ	var. Opal-Agate	4.DA.10	SiO₂ · nH₂O
ⓘ	var. Precious Opal	4.DA.10	SiO₂ · nH₂O
Group 5 - Nitrates and Carbonates
ⓘ	Calcite	5.AB.05	CaCO₃
ⓘ	Aragonite	5.AB.15	CaCO₃
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Wulfenite ?	7.GA.05	Pb(MoO₄)
Group 9 - Silicates
ⓘ	Anorthite	9.FA.35	Ca(Al₂Si₂O₈)
ⓘ	var. Labradorite	9.FA.35	(Ca,Na)[Al(Al,Si)Si₂O₈]
Unclassified
ⓘ	'Amber' ?	-
ⓘ	'Bloodstone'	-	SiO₂
ⓘ	'Petrified Wood'	-

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Opal	SiO₂ · nH₂O
H	ⓘ Opal var. Opal-Agate	SiO₂ · nH₂O
H	ⓘ Opal var. Precious Opal	SiO₂ · nH₂O
C	Carbon
C	ⓘ Aragonite	CaCO₃
C	ⓘ Calcite	CaCO₃
O	Oxygen
O	ⓘ Quartz var. Agate	SiO₂
O	ⓘ Quartz var. Amethyst	SiO₂
O	ⓘ Anorthite	Ca(Al₂Si₂O₈)
O	ⓘ Aragonite	CaCO₃
O	ⓘ Calcite	CaCO₃
O	ⓘ Quartz var. Chalcedony	SiO₂
O	ⓘ Quartz var. Citrine	SiO₂
O	ⓘ Anorthite var. Labradorite	(Ca,Na)[Al(Al,Si)Si₂O₈]
O	ⓘ Quartz var. Moss Agate	SiO₂
O	ⓘ Opal	SiO₂ · nH₂O
O	ⓘ Opal var. Opal-Agate	SiO₂ · nH₂O
O	ⓘ Quartz	SiO₂
O	ⓘ Wulfenite	Pb(MoO₄)
O	ⓘ Opal var. Precious Opal	SiO₂ · nH₂O
O	ⓘ Quartz var. Eye Agate	SiO₂
O	ⓘ Quartz var. Fortification Agate	SiO₂
O	ⓘ Quartz var. Iris Agate	SiO₂
O	ⓘ Bloodstone	SiO₂
O	ⓘ Quartz var. Carnelian	SiO₂
O	ⓘ Quartz var. Plume Agate	SiO₂
Na	Sodium
Na	ⓘ Anorthite var. Labradorite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Al	Aluminium
Al	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Al	ⓘ Anorthite var. Labradorite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Si	Silicon
Si	ⓘ Quartz var. Agate	SiO₂
Si	ⓘ Quartz var. Amethyst	SiO₂
Si	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Si	ⓘ Quartz var. Chalcedony	SiO₂
Si	ⓘ Quartz var. Citrine	SiO₂
Si	ⓘ Anorthite var. Labradorite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Si	ⓘ Quartz var. Moss Agate	SiO₂
Si	ⓘ Opal	SiO₂ · nH₂O
Si	ⓘ Opal var. Opal-Agate	SiO₂ · nH₂O
Si	ⓘ Quartz	SiO₂
Si	ⓘ Opal var. Precious Opal	SiO₂ · nH₂O
Si	ⓘ Quartz var. Eye Agate	SiO₂
Si	ⓘ Quartz var. Fortification Agate	SiO₂
Si	ⓘ Quartz var. Iris Agate	SiO₂
Si	ⓘ Bloodstone	SiO₂
Si	ⓘ Quartz var. Carnelian	SiO₂
Si	ⓘ Quartz var. Plume Agate	SiO₂
Ca	Calcium
Ca	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Ca	ⓘ Aragonite	CaCO₃
Ca	ⓘ Calcite	CaCO₃
Ca	ⓘ Anorthite var. Labradorite	(Ca,Na)[Al(Al,Si)Si₂O₈]
Mo	Molybdenum
Mo	ⓘ Wulfenite	Pb(MoO₄)
Pb	Lead
Pb	ⓘ Wulfenite	Pb(MoO₄)

Fossils

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Wikidata ID:	Q661540

Localities in this Region

USA

Texas
- Brewster County
  - Alpine

Other Regions, Features and Areas that Intersect

North AmericaContinent

North America PlateTectonic Plate

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References

Agates from Alpine, Texas. Rocks and Minerals, 19 (8), 246.

Bacon, Charles Sumner, Jr. (1941), Succession of the igneous rocks of the Alpine region (abstract): Texas Academy of Science Proceedings 1940: 24: 6.

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List of minerals arranged by Strunz 10th Edition classification