Printable Geode Identification Chart

This geode identification chart is for rock collectors, students, teachers, and anyone sorting geode finds at home or outdoors. The single-page Letter PDF lists common minerals in a four-column chart: Mineral, Appearance, Mohs, and Test/clue. Entries include quartz with clear or white points, amethyst with purple points, and chalcedony or agate with waxy bands and translucent layers. It also notes useful clues such as scratching glass or fading in sun.

Free printable · PDF

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

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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 the chart as a quick reference while comparing a broken geode, crystal points, or polished pieces. Check more than one clue before naming a specimen, since color and texture can vary. The sheet also reminds you to confirm identifications with several tests, which helps keep results more reliable when you are sorting similar-looking stones.

Good for

Sort geode specimens by visible clues
Support mineral ID lessons and activities
Keep in a field notebook or rock kit

Tip: Print on cardstock and keep it with a hand lens for quick field checks.

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