Stromatolitic limestone (stromatolite) — sedimentary Identification & Properties | Geo-Gem
Stromatolitic limestone (stromatolite) is a sedimentary. 1) Drop dilute (10%) HCl or household vinegar: calcite-rich stromatolite will fizz vigorously on all fresh surfaces. 2) Scratch test: should be ~3 on Mohs (knife scratches it; fingernail does not). 3) Streak: white. 4) Hand-lens check: loo…