Created by gemini-2.0-flash on 2025-05-18

Here's a description of the image:

The image shows a irregularly shaped piece of light brown/tan rock against a white background. The rock has a rough, fractured texture along its edges. A noticeable band of darker, golden-brown material runs across the top third of the rock, appearing like a sediment layer.

The most striking feature is the dark dendritic (tree-like) patterns that appear primarily in the lower half of the rock. These patterns resemble plant fossils, though they are likely mineral formations. The color of the dendrites is a dark gray/black.

Created by gemini-2.0-flash-lite on 2025-05-18

Here is a description of the image:

The image shows a piece of rock, roughly triangular in shape, lying against a plain white background. The rock is a light tan or beige color with a rough, uneven surface. Across the surface of the rock are intricate, branching patterns that resemble tiny trees or ferns. These "dendritic" patterns are dark, almost black, and create a visual effect that is very striking. There is a thin strip of a deeper, golden-brown color running horizontally across the rock near the top. The edges of the rock are uneven and slightly rough, revealing its natural origin. The overall impression is one of natural beauty and the geological formation of the rock.