Quartz clusters consist of multiple terminated crystals growing together from a common matrix, often displaying beautiful geometric arrangements. Collectors highly prize specimens with sharp, clean terminations and high clarity or aesthetic inclusions. These are frequently found in hydrothermal vein systems where open space allows the crystals to grow undisturbed.
Is this quartz clusters?
5-step field checkRun through these checks against the specimen in your hand. The more boxes tick, the more confident the ID.
- 1Test the hardnessTry to scratch quartz clusters with a known reference. Quartz Clusters sits at Mohs 7 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Quartz Clusters leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Quartz Clusters typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: colorless, white, milky.
- 5Look at form & habitCrystal system: trigonal. Typical habit: prismatic clusters.
Often confused with
Quartz Clusters vs. its common look-alikes — and how to tell them apart in the field.
How to tell apart: Quartz Clusters is noticeably harder (Mohs 7 vs. 3).
How to tell apart: Quartz Clusters is noticeably harder (Mohs 7 vs. 4.5-5); luster reads vitreous on Quartz Clusters and vitreous to pearly on Apophyllite.
Often found alongside quartz clusters
Minerals reported to co-occur with quartz clusters. 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
- Streak
- White
- Luster
- Vitreous
- Transparency
- Transparent
- Crystal system
- Trigonal
- Crystal habit
- Prismatic Clusters
- Cleavage
- None
- Rarity
- Common
- Uses
- Collector, Decorative, Lapidary
- Host rock
- Hydrothermal Veins and Alpine Clefts
- Typical price
- $10-50 for small specimens, $200-5000+ for large museum-grade displays
Where rockhounds find quartz clusters
2 mapped spotsClassic worldwide localities
- Arkansas, USA
- Diamantina, Brazil
- Himalayas, Pakistan
- Madagascar
- Switzerland
Field-hunting tip
Look in hydrothermal veins and alpine clefts country — that is the host setting where quartz clusters typically forms. If you start seeing adularia, chlorite, hematite in float, you are in the right ground. Field specimens usually show a prismatic clusters habit, so train your eye for that shape before scanning the outcrop. In the U.S., the densest reported localities are in New Mexico — start trip planning there.
Common questions
How do you identify quartz clusters?+
Where is quartz clusters found?+
Can I find quartz clusters in the United States?+
How much is quartz clusters worth?+
What rocks look like quartz clusters?+
What minerals are found with quartz clusters?+
What kind of rock does quartz clusters form in?+
What is quartz clusters used for?+
Find quartz clusters on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
