Senkevichite is a rare potassium-sodium-calcium titanium silicate mineral found primarily in alkaline igneous environments. It typically occurs as small platy or tabular crystals within pegmatitic pockets alongside other rare-earth and alkali-rich minerals. Collectors primarily find this mineral in the Khibiny and Lovozero massifs of the Kola Peninsula.
Is this senkevichite?
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 senkevichite with a known reference. Senkevichite sits at Mohs 5 — softer than the next harder reference, harder than the previous one.
- 2Check the streakDrag the specimen across an unglazed porcelain plate. Senkevichite leaves a white streak.
- 3Read the lusterHold the specimen under a strong light. Senkevichite typically shows a vitreous luster.
- 4Match the color rangeCompare against the expected color range: yellow, brown, tan.
- 5Look at form & habitCrystal system: triclinic. Typical habit: platy crystals.
Often confused with
Senkevichite vs. its common look-alikes — and how to tell them apart in the field.
How to tell apart: Senkevichite is noticeably harder (Mohs 5 vs. 3-4); streak differs — Senkevichite leaves white, Kupletskite leaves brown; luster reads vitreous on Senkevichite and submetallic on Kupletskite.
How to tell apart: Senkevichite is noticeably harder (Mohs 5 vs. 3); streak differs — Senkevichite leaves white, Astrophyllite leaves golden-brown; luster reads vitreous on Senkevichite and submetallic on Astrophyllite.
Often found alongside senkevichite
Minerals reported to co-occur with senkevichite. Spotting these in float or country rock is a strong cue you are in the right ground.
All properties
- Chemical formula
- KNaCaTiSi₄O₁₂OH
- Mohs hardness
- 5
- Density
- 3.17 g/cm³
- Streak
- White
- Luster
- Vitreous
- Transparency
- Translucent
- Crystal system
- Triclinic
- Crystal habit
- Platy Crystals
- Cleavage
- Perfect
- Rarity
- Rare
- Uses
- Collector
- Host rock
- Alkaline Pegmatites
- Typical price
- $50-300 per specimen
Where rockhounds find senkevichite
Classic worldwide localities
- Kola Peninsula, Russia
Field-hunting tip
Look in alkaline pegmatites country — that is the host setting where senkevichite typically forms. If you start seeing aegirine, microcline, nepheline in float, you are in the right ground. Field specimens usually show a platy crystals habit, so train your eye for that shape before scanning the outcrop.
Common questions
How do you identify senkevichite?+
Where is senkevichite found?+
How much is senkevichite worth?+
What rocks look like senkevichite?+
What minerals are found with senkevichite?+
What kind of rock does senkevichite form in?+
What is senkevichite used for?+
Find senkevichite on the map
RockHoundR shows mapped rockhounding spots, access rules, and lets you log every find.
