Coming soon · Color by number for adults
Rockhound Field Tray
Color by Number: A Mineral Coloring Book for Adults
Explore 30 original mineral illustrations, from crystal faces and curling copper to rounded malachite forms. Follow a consistent 20-color numbered key or choose your own shades, with a short fact and a closer-look prompt beside every design.
- Choose from broad shapes and smaller facets across the collection.
- Match each design’s numbers to its color-name key.
- Make time for a mineral study with your favorite colored pencils.
Two ways to color · Coming soon
A field tray for your imagination.
Paperback
68 pages · 8.5 × 11 inches
30 black-and-white coloring designs, each with a blank reverse. Includes a 20-color master key, a smaller key beside each design, short mineral facts and source notes.
Printable PDF
38 pages · US Letter, 8.5 × 11 inches
The same 30 black-and-white designs, plus 8 pages of guides, credits and source notes. Print designs single-sided if you want blank backs.
No physical book or coloring supplies are included with the PDF.
Both editions are being prepared for release. Purchase links will appear here when available.
A closer look
Little numbers.
Rounded discoveries.
Malachite can form rounded, grape-like surfaces. Find two rounded lobes in this design, then choose a green to start.
Mineral note source: Museum Wales
What should I color with?
Designed for dry colored pencils. Use the printed color names as suggestions, choose the closest shades you have, and test your pencils on spare paper first. For the printable edition, choose paper compatible with your printer and pencils.
Do I need exactly 20 pencils?
No. The master key uses 20 numbered color names across the book; each page uses a smaller selection. Match them with the closest shades you have, or choose your own palette.
Are these mineral-identification pictures?
These are invented specimen studies. The colors are artistic suggestions, not a guide to identifying minerals.
Can I use wet media in the paperback?
The book is designed for dry colored pencils. Its paper has not been tested for wet media, and blank backs do not prevent bleed-through.
One design, six guide colors
Watch the greens settle in.
Press play for an 18-second illustrated color-fill preview using the book’s exact Malachite design. The video is silent; colors are artistic suggestions.
Read the video description
The numbered Malachite illustration starts uncolored. Pale green, leaf green and forest green fill its rounded forms. Beige, warm gray and umber fill the base. The matching key entry is highlighted with each color. The finished study holds on screen with a prompt to notice the rounded, grape-like surfaces.