MINERALOGY · GEOLOGY · TAJIKISTAN
Everystonehas
adeeperstory.
Explore mineral species, gem varieties, documented localities, and the research that connects them.
Featured specimen · Spinel in marble
FROM THE ENCYCLOPEDIA
Start with a specimen.
Then follow its family, locality, and evidence.
Corundum
Al₂O₃An aluminium oxide mineral whose gem varieties include ruby and sapphire.
Stones · Ruby · Sapphire
Spinel
MgAl₂O₄A durable oxide mineral whose transparent red varieties have long been confused with ruby.
Stones · Spinel
Beryl
Be₃Al₂Si₆O₁₈A ring silicate mineral family that includes emerald and aquamarine.
Stones · Emerald · AquamarineINSIDE THE CRYSTAL
See the atoms behind the stone.
Every mineral is a repeating pattern of atoms. Turn the unit cell, zoom in, and tap an element to find it.
Open the mineral pageSTONES
Start with a name you know.
Ruby, lapis, agate: each gem or rock leads back to the mineral that makes it.
RubyCorundum
SapphireCorundum
EmeraldBeryl
AquamarineBeryl
AmethystQuartz
DiamondDiamond
Precious opalOpal
GarnetGarnet group
TopazTopaz
TourmalineTourmaline
Lapis lazuliLazurite · Calcite
AgateQuartz
PeridotForsteriteMINERAL OF THE DAY
Corundum
Al₂O₃An aluminium oxide mineral whose gem varieties include ruby and sapphire.
- Hardness
- 9
- Crystal system
- Trigonal
- Group
- Oxides
MOHS HARDNESS
What scratches what?
Each mineral scratches the ones to its left. Our minerals, placed on the scale of ten reference minerals.
- 1Talc
- 2Gypsum
- 3Calcite
- 4Fluorite
- 5Apatite
- 6Orthoclase
- 7Quartz
- 8Topaz
- 9Corundum
- 10Diamond
CONNECTED KNOWLEDGE
A stone is only the beginning.
Move from identity to place, specimen, and published evidence without losing the scientific thread.
- 01Mineral speciesChemistry and structure
- 02Gem varietiesNames, colours, and families
- 03Documented localityRegional context, safely shown
- 04Research evidenceSources you can inspect
TAJIKISTAN FIELD GUIDE
Read the mountains.
Explore geological regions and sourced mineral occurrences at responsible public precision.
Open the field guideDEEP TIME
600 million years in one line.
How oceans closed, continents collided, and the Pamir rose. Tap a number to see that moment drawn.
ARTICLES & STORIES
Latest reading.
A Test Article
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Muhammadsiddiq Tohiri
How deep crust reaches daylight in the Pamir
Mineral clocks and structural geology reveal how once-buried Pamir crust was heated, deformed, and brought back toward the surface.
Project Sang Editorial
How to read a mineral assemblage at Dara-i-Pioz
At Dara-i-Pioz, the minerals beside a crystal reveal a sodium-rich alkaline system more clearly than colour alone.
Project Sang EditorialEVIDENCE LIBRARY
See what supports the story.
Research records retain authorship, publication details, access status, and lawful external links.
Browse all researchThe Mineral Industry of Tajikistan in 2022
U.S. Geological Survey · Public-domain USGS PDF.Journal article · 2022Middle to late Miocene growth of the North Pamir
Li et al. · Publisher record with supporting information.Journal article · 2020The Tajik Basin: A composite record of sedimentary basin evolution in response to tectonics in the Pamir
Chapman, Carrapa, DeCelles et al. · Publisher page; supplementary data reported open.STUDY COLLECTION
