Tourmalinated Quartz is a popular collector variety of clear quartz that contains natural inclusions of acicular or needle-like black tourmaline crystals. The contrast between the needle-like tourmaline fibers and the transparent host quartz makes it highly sought after for both lapidary work and mineral displays.

Hardness

Mohs

Luster

Vitreous

Streak

White

Transparency

Transparent

mineralcommonQuartz family

Tourmalinated Quartz

Hardness: 7
Luster: Vitreous
Streak: White
Transparency: Transparent

Is this tourmalinated quartz?

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 tourmalinated quartz with a known reference. Tourmalinated Quartz sits at Mohs 7 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Tourmalinated Quartz leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Tourmalinated Quartz typically shows a vitreous luster.
4
Match the color range
Compare against the expected color range: colorless, white.
5
Look at form & habit
Crystal system: trigonal. Typical habit: prismatic crystals with needle-like inclusions.

Often confused with

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

Often found alongside tourmalinated quartz

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

All properties

Chemical formula: SiO₂
Mohs hardness: 7
Density: 2.65 g/cm³
Colors: Colorless White
Streak: White
Luster: Vitreous
Transparency: Transparent
Crystal system: Trigonal
Crystal habit: Prismatic Crystals with Needle-like Inclusions
Cleavage: None
Rarity: Common
Uses: Lapidary, Collector, Decorative
Host rock: Pegmatites
Typical price: $10-100 per specimen

Where rockhounds find tourmalinated quartz

Classic worldwide localities

Brazil
Madagascar
USA
India
Sri Lanka

Field-hunting tip

Look in pegmatites country — that is the host setting where tourmalinated quartz typically forms. If you start seeing tourmaline, feldspar, mica in float, you are in the right ground. Field specimens usually show a prismatic crystals with needle-like inclusions habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify tourmalinated quartz?+

Mohs hardness is 7. It typically shows a vitreous luster. The streak is white. Common colors include colorless, white.

Where is tourmalinated quartz found?+

Notable localities include Brazil; Madagascar; USA; India; Sri Lanka.

How much is tourmalinated quartz 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 tourmalinated quartz?+

Tourmalinated Quartz is most often confused with Rutilated Quartz. A quick hardness test and a streak check separate the look-alikes faster than color alone.

What minerals are found with tourmalinated quartz?+

Tourmalinated Quartz commonly co-occurs with Tourmaline, Feldspar, Mica. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does tourmalinated quartz form in?+

Tourmalinated Quartz typically forms in pegmatites. Working float back to the host body is the standard way to chase a fresh occurrence.

What is tourmalinated quartz used for?+

Tourmalinated Quartz is used in lapidary, collector, decorative.

Find tourmalinated quartz on the map

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