Cut and polished azurite-malachite from copper-district material, finished as a bookend pair that displays the blue-to-green alteration front. Each pair is labeled with locality and comes with the matching identification sheets.
About the stone
Each pair is cut from copper-district rock where blue azurite is altering to green malachite in place, so the polished faces record the reaction front itself: the same specimen is chemically becoming its companion mineral. Read the full story on the identification sheets, then argue about which side is the front of the shelf.
Pairs well with
- Azurite Identification Sheet
- Malachite Identification Sheet
- Rockies Field Notebook — for recording where you wish you had collected it yourself