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INDIA STATE FIELD GUIDE

Rockhounding in Sikkim

Quick answer

Sikkim currently has 50 sourced map records in this explorer. Sikkim has strong rockhounding geology despite its small area: the Rangpo–Dikchu–Pachekhani base-metal belt, Rangit Valley coal, Chitre–Dareli and Dentam–Uttarey graphite, Ranikhola–Mansari talc/quartzite, Rangit-window dolomite/limestone, marble, sillimanite and thermal springs. The current state mineral policy tightly regulates extraction, so this guide keeps all Sikkim records non-navigable unless recreational access is independently verified.

50mapped localities
0permission required
12status not confirmed
38viewing/protected

Materials documented in Sikkim

Coal 8 Sandstone 8 Schist 7 Marble 7 Carbonaceous shale 6 Limestone 6 Carbonate rock 6 Thermal spring 6 Gneiss 6 Quartz 5 Graphite 5 Graphitic schist 5 Dolomite 5 Calcite 5

Why Sikkim matters for base metals, graphite, carbonate rocks and Himalayan metamorphic geology

The state lies in the Eastern Himalaya and exposes Daling/Gorubathan metasediments, high-grade gneiss-schist terrain and Gondwana windows. Government sources document copper-lead-zinc-silver at Rangpo/Bhotang, Dikchu and Pachekhani, graphite in western Sikkim, coal in the Rangit Valley, talc/quartzite, extensive dolomite-limestone, marble and sillimanite. This release maps those occurrences conservatively and separates mineral evidence from any claim of public collecting rights.

Government of Sikkim — Mines, Minerals & Geology Department: Mineral Reserves ↗

Mapped locality guides

Bhotang–Rangpo Polymetallic DepositCopper, Lead, Zinc, SilverReference / viewing onlyRangpo — Teesta Left-Bank Cu-Zn-Pb Sulphide ExposureChalcopyrite, Sphalerite, Galena, Sulphide oreReference / viewing onlyRangpo — Gorubathan Formation Base-Metal Host RocksPhyllite, Schist, Quartz, Base-metal sulphidesReference / viewing onlyDikchu Copper–Zinc LodeCopper, Zinc, Sulphide oreReference / viewing onlyDikchu — Garnet–Staurolite–Quartz–Mica Schist HostGarnet, Staurolite, Quartz, Mica schistReference / viewing onlyPachekhani–Rorathang Stratabound Base-Metal OccurrenceCopper, Lead, Zinc, SulphidesReference / viewing onlyPachekhani — Gorubathan Formation Mineralized BeltPhyllite, Quartz, Sulphides, Base-metal mineralizationReference / viewing onlyDuglakha Base-Metal ProspectCopper, Lead-Zinc, SulphidesReference / viewing onlyNamchi Coal OccurrenceCoal, Carbonaceous shale, SandstoneReference / viewing onlyNamchi–Tinjir Road Coal-Bearing SectionCoal, Shale, SandstoneReference / viewing onlyRishi–Sagbari Coal Occurrence BeltCoal, Carbonaceous shale, SandstoneReference / viewing onlyPut Khola Coal OccurrenceCoal, Carbonaceous shale, SandstoneReference / viewing onlyRoathak Khola Coal OccurrenceCoal, Carbonaceous shale, SandstoneReference / viewing onlyRinchenpong Coal OccurrenceCoal, Carbonaceous shale, SandstoneReference / viewing onlyChitre Graphite OccurrenceGraphite, Graphitic schist, Marble, PegmatiteReference / viewing onlyDareli Graphite OccurrenceGraphite, Graphitic schist, Marble, PegmatiteReference / viewing onlyDentam Graphite BeltGraphite, Graphitic schistReference / viewing onlyUttarey Graphite BeltGraphite, Graphitic schistReference / viewing onlyRanikhola–Mansari Talc OccurrenceTalc, Steatite, Soapstone, QuartziteReference / viewing onlyRanikhola–Mansari High-Silica QuartziteQuartzite, Quartz, SilicaReference / viewing onlyNaya Bazar–Legship Dolomite BeltDolomite, LimestoneReference / viewing onlyRishi / Rishikhola Dolomite BlocksDolomite, Limestone, Carbonate rockReference / viewing onlyRishi — Buxa Formation Carbonate Host RocksDolomite, Limestone, PhylliteReference / viewing onlyTsungthang / Chungthang Marble OccurrenceMarble, Calcite, Carbonate rockReference / viewing onlyTsomgo (Tsongo) Marble OccurrenceMarble, Calcite, Carbonate rockReference / viewing onlyTolong Marble OccurrenceMarble, Calcite, Carbonate rockReference / viewing onlyChungthang Limestone–Marble BeltLimestone, Marble, CalciteReference / viewing onlyTsomgo / Chhangu Crystalline Limestone ContextCrystalline limestone, Calcite, MarbleReference / viewing onlyRoathak Khola — Sillimanite Boulder OccurrenceSillimanite, Metamorphic bouldersReference / viewing onlyRoathak Khola — In-Situ Sillimanite LensesSillimanite, Biotite schist, Metamorphic rockReference / viewing onlyChangey Khola — Sillimanite/Kyanite SchistSillimanite, Kyanite, Biotite schistReference / viewing onlyTashiding — Tremolite/Actinolite–Asbestos OccurrenceTremolite, Actinolite, Asbestos, PhylliteReference / viewing onlyPhurtsachu Sulphurous Thermal SpringThermal spring, Sulphur, Hydrothermal mineralsCollecting status not confirmedBorong Thermal SpringThermal spring, Sulphur, Hydrothermal geologyCollecting status not confirmedPolot Thermal Spring ContextThermal spring, Hydrothermal geologyCollecting status not confirmedYumthang Sulphurous Thermal SpringThermal spring, Sulphur, Hydrothermal mineralsCollecting status not confirmedTarum Thermal SpringThermal spring, Sulphur, Hydrothermal geologyCollecting status not confirmedTolung Thermal SpringThermal spring, Hydrothermal geologyCollecting status not confirmedNathu La — High-Grade Himalayan Metamorphic GeologyGneiss, Schist, Metamorphic rock, Himalayan tectonicsCollecting status not confirmedKupup — High-Altitude Crystalline Rock ContextGneiss, Schist, Crystalline rockCollecting status not confirmedLachen — Himalayan Gneiss & Schist ContextGneiss, Schist, Metamorphic rockCollecting status not confirmedLachung — Himalayan Gneiss & Schist ContextGneiss, Schist, Metamorphic rockCollecting status not confirmedYuksom — High-Grade Metamorphic Rock ContextGneiss, Schist, Quartz-rich metamorphic rockCollecting status not confirmedMangan — Metamorphic & Tectonic Geology ContextGneiss, Schist, Metamorphic rock, Tectonic geologyCollecting status not confirmed

Access and collecting rules

Sikkim contains important Eastern Himalayan base-metal, coal, graphite, talc, quartzite, dolomite/limestone, marble and sillimanite geology plus thermal-spring and high-grade metamorphic contexts. Most documented mineral localities are resource, mine, exploration, forest, border or ecologically sensitive settings. Geological occurrence is not permission to collect.

Government of Sikkim — Sikkim Mineral Policy, 2025 / Sikkim Minor Minerals Concession Rules, 2025 ↗

Dataset last reviewed: September 8, 2026. Coordinates are reference points; some mineral databases warn that locality coordinates may be generalized.

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