Alibates Flint is a highly silicified dolomite formed in the Permian period, famous for its vivid, banded patterns and vibrant color range. It was historically prized by Indigenous peoples for making durable stone tools and is now collected for its unique appearance in lapidary work. It typically appears as nodules or tabular masses within the Alibates Dolomite Member.

Hardness

6.5-7

Mohs

Luster

Waxy

Streak

White

Transparency

Opaque

fossiluncommonQuartz family

Alibates Flint

Also: Alibates Agate

Hardness: 6.5-7
Luster: Waxy
Streak: White
Transparency: Opaque

Is this alibates flint?

5-step field check

Run through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.

1
Test the hardness
Try to scratch alibates flint with a known reference. Alibates Flint sits at Mohs 6.5-7 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Alibates Flint leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Alibates Flint typically shows a waxy luster.
4
Match the color range
Compare against the expected color range: red, white, blue, brown, gray.
5
Look at form & habit
Crystal system: trigonal. Typical habit: massive.

Often confused with

Alibates Flint vs. its common look-alikes — and how to tell them apart in the field.

Often found alongside alibates flint

Minerals reported to co-occur with alibates flint. Spotting these in float or country rock is a strong cue you are in the right ground.

All properties

Chemical formula: SiO₂
Mohs hardness: 6.5-7
Density: 2.6-2.7 g/cm³
Colors: Red White Blue Brown Gray
Streak: White
Luster: Waxy
Transparency: Opaque
Crystal system: Trigonal
Crystal habit: Massive
Cleavage: None
Rarity: Uncommon
Uses: Lapidary, Collector, Decorative
Host rock: Sedimentary Dolomite Deposits
Typical price: $10-100 per specimen

Where rockhounds find alibates flint

1 mapped spots

Classic worldwide localities

Texas Panhandle
Alibates Flint Quarries National Monument

Field-hunting tip

Look in sedimentary dolomite deposits country — that is the host setting where alibates flint typically forms. If you start seeing dolomite, calcite, gypsum in float, you are in the right ground. Field specimens usually show a massive habit, so train your eye for that shape before scanning the outcrop. In the U.S., the densest reported localities are in Texas — start trip planning there.

Browse 1 U.S. spots for alibates flint →

Common questions

How do you identify alibates flint?+

Mohs hardness is 6.5-7. It typically shows a waxy luster. The streak is white. Common colors include red, white, blue, brown.

Where is alibates flint found?+

Notable localities include Texas Panhandle; Alibates Flint Quarries National Monument.

Can I find alibates flint in the United States?+

RockHoundR maps 1 alibates flint rockhounding spots across 1 U.S. states — the top states are Texas.

How much is alibates flint worth?+

Typical asking prices fall in the range of $10-100 per specimen. Quality, size, and provenance can move individual specimens well outside that range.

What rocks look like alibates flint?+

Alibates Flint is most often confused with Flint Nodules, Jasper, Chalcedony. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with alibates flint?+

Alibates Flint commonly co-occurs with Dolomite, Calcite, Gypsum. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does alibates flint form in?+

Alibates Flint typically forms in sedimentary dolomite deposits. Working float back to the host body is the standard way to chase a fresh occurrence.

What is alibates flint used for?+

Alibates Flint is used in lapidary, collector, decorative.

Find alibates flint on the map

RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.