Can you name that crystal?
A new 5-stone challenge every day. Look at the photo, pick the right crystal, rock or gemstone — then learn the colour, lustre and hardness clues that give each one away.
- 250+stones with photos
- Dailyfresh 5-stone puzzle
- 12colours to explore
Three ways to use Gemdle
Play & build a streak
A 5-stone daily challenge plus an endless quiz. Guess from a real specimen photo, see why you were right or wrong, share your score.
🔎Identify a stone you own
Filter by the clues you can actually observe — colour, lustre, hardness and transparency — to get a ranked shortlist of likely matches.
📖Browse 250+ stones
An A–Z guide of crystals, rocks and gemstones with photos, real mineral properties and how to tell look-alikes apart.
Popular stones to learn
Start with the stones people search for most — each page has multiple specimen photos and the physical traits that identify it.
Browse by colour
Colour is the fastest way to narrow down an unknown stone. Pick a hue to see the crystals, rocks and gemstones that wear it — with photos, Mohs hardness and how to tell them apart.
Learn to read a stone, not just its name
Most "crystal" sites lead with metaphysical meanings. Gemdle does the opposite: we focus on what you can actually see and test. Real identification leans on a handful of observable clues — colour (though many minerals come in several), lustre (glassy, metallic, waxy or pearly), Mohs hardness (what scratches what), streak (the colour of the powder) and crystal habit (the shape it grows in).
The daily game trains your eye on real specimen photos; the guided identifier lets you filter by those same traits; and every stone page shows the properties side by side. Photos and mineral data come from Wikimedia Commons and Wikipedia — we never invent values or copy gem-shop sales copy.