The field kit
Free rock and mineral tools
Last updated 2026-11-10
Three small, fast tools for the questions every rockhound asks: what is it, how hard is it, and could it possibly be from space?
Rock identifier
Answer up to six quick questions about color, luster, a scratch test, streak, texture and a few special tricks (magnet, vinegar, weight). The identifier ranks the likely candidates from its dataset of common rocks, minerals and look-alikes, shows why each fits and what does not, and suggests the next test. Every entry lists its sources.
Mohs hardness scale
The ten reference minerals, the everyday testers from fingernail to steel file, a simulator that tells you what scratches what, and a searchable list of more than 90 minerals, gems, metals and rocks with their hardness and sources.
Is it a meteorite?
Nine checks, one at a time: fusion crust, a cheap magnet, metal flecks, bubbles, streak, weight, surface and where you found it. You get an honest verdict, the look-alikes your answers point to, and who can confirm a real meteorite.
Coming next
A streak color chart, a specific gravity calculator and a collecting rules finder are on the list. Join the early-access list below and we will tell you when the RockhoundID app and new tools land.
Guides that go with this
identification
How to Identify Rocks: A Simple 7-Test Method
identification
Rock Identification Chart: Match Your Find in 5 Steps