Pale Green-Yellow Pebble
A rock — a smooth, well-rounded, pale yellow-green ovoid pebble with a fine, even, matte grain. Best read: a fine-grained sandstone or quartzite (silica-rich, SiO₂ dominated), the faint greenish tint likely from traces of iron-bearing or chloritic/glauconitic minerals, the yellow from light iron staining.
What its shape tells you
The beautifully smooth, symmetric egg shape is a transport signature: this pebble was tumbled by water for a very long time — in a river bed or surf — until every edge was abraded off. Rounding like this takes a long journey or a long time in energetic water. The even grain (no visible crystals, no layering) means it’s a uniform fine-grained rock, which abrades into a smooth, soap-like surface rather than chipping.
Test for the type
- Scratches glass, doesn’t fizz → quartzite/sandstone (silica). Most likely.
- Fizzes in vinegar → a limestone instead (calcium carbonate).
- Grain rubs off on your fingers → a softer sandstone; stays solid → quartzite (metamorphosed, fused).
A classic, satisfying “holding-stone” pebble — the kind a river spends millennia polishing.
Filed under the natural-artifacts collection. See also: white-quartz-pebble.