Voggite is a rare phosphate mineral primarily known from the Francon quarry in Montreal. It typically occurs as delicate, colorless to white bladed or platy crystals lining cavities within altered alkaline rocks.

Hardness

3-4

Mohs

Luster

Vitreous

Streak

White

Transparency

Transparent

mineralrare

Voggite

Hardness: 3-4
Luster: Vitreous
Streak: White
Transparency: Transparent

Is this voggite?

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 voggite with a known reference. Voggite sits at Mohs 3-4 — softer than the next harder reference, harder than the previous one.
2
Check the streak
Drag the specimen across an unglazed porcelain plate. Voggite leaves a white streak.
3
Read the luster
Hold the specimen under a strong light. Voggite 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: monoclinic. Typical habit: bladed crystals.

Often confused with

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

mineral

Gittinsite

Mohs 5

How to tell apart: Gittinsite is the harder of the two (Mohs 5 vs. 3-4).

Compare →

Often found alongside voggite

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

All properties

Chemical formula: Na₂Zn₂Zr(PO₄)₂F₂·12H₂O
Mohs hardness: 3-4
Density: 2.66 g/cm³
Colors: Colorless White
Streak: White
Luster: Vitreous
Transparency: Transparent
Crystal system: Monoclinic
Crystal habit: Bladed Crystals
Cleavage: Good
Rarity: Rare
Uses: Collector
Host rock: Alkaline Igneous Intrusions
Typical price: $50-300+ depending on crystal size and quality

Where rockhounds find voggite

Classic worldwide localities

Francon quarry, Montreal, Quebec, Canada

Field-hunting tip

Look in alkaline igneous intrusions country — that is the host setting where voggite typically forms. If you start seeing quartz, calcite, dawsonite in float, you are in the right ground. Field specimens usually show a bladed crystals habit, so train your eye for that shape before scanning the outcrop.

Common questions

How do you identify voggite?+

Mohs hardness is 3-4. It typically shows a vitreous luster. The streak is white. Common colors include colorless, white.

Where is voggite found?+

Notable localities include Francon quarry, Montreal, Quebec, Canada.

How much is voggite worth?+

Typical asking prices fall in the range of $50-300+ depending on crystal size and quality. Quality, size, and provenance can move individual specimens well outside that range.

What rocks look like voggite?+

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

What minerals are found with voggite?+

Voggite commonly co-occurs with Quartz, Calcite, Dawsonite, Gittinsite. Spotting any of these in float or country rock is a useful trip signal.

What kind of rock does voggite form in?+

Voggite typically forms in alkaline igneous intrusions. Working float back to the host body is the standard way to chase a fresh occurrence.

What is voggite used for?+

Voggite is used in collector.

Find voggite on the map

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