Printable Mohs Hardness Card

This one-page Mohs hardness card is for anyone comparing rocks and minerals during geode sorting, classroom lessons, or field trips. It lists the Mohs hardness scale in three columns: Hardness, Mineral, and Everyday comparison. The rows include 1 Talc, 2 Gypsum with Fingernail ≈ 2.5, and 3 Calcite with Copper coin ≈ 3.5.

Free printable · PDF

1 page
US Letter — choose “Fit to page” for A4
PDF, 97 KB

Download free PDF

Free for personal, family and classroom use.

Need to edit it? The full pack has the editable Excel and Word files plus all 7 sheets — $6.00, one-time.

Use it as a quick reference while testing a specimen against common objects. Match the number to the mineral name, then compare it to the everyday item shown on the card. Print it and keep it with your mineral ID pages, or laminate it for repeated use at a desk, in a kit, or outdoors.

Good for

Check mineral hardness during geode sorting
Support earth science and geology lessons
Keep in a field kit for quick reference

Tip: Print on card stock or laminate the sheet so it holds up during repeated hardness tests.

7 files · PDF, XLSX, DOCX

Get every sheet: Geode Identification Chart Pack

This sheet plus 6 more in one download, with the editable Excel and Word files. Geode ID chart, is-it-a-geode checklist, localities sheet, cracking guide, Mohs hardness card, field log workbook and specimen labels.

$6.00 USD, one-time 7 files · about $0.86 each