Hand-painted underwater scene on rock

This is a decorative hand-painted artwork created directly on a natural stone canvas, measuring approximately 6.5 inches by 5.5 inches and weighing around 1.3 pounds. The composition depicts an undersea scene featuring a sunken wooden ship wreck with visible masts, several marine creatures including a shark, a jellyfish, crabs, a starfish, and smaller fish, alongside coral formations and seaweed. The medium appears to be acrylic or similar opaque paint, showing textured brushstrokes and layered colors with a glossy protective top coat reflecting light. The background water is rendered in shades of blue with white light rays filtering downwards. There are no visible signatures, maker's marks, or dates inscribed on the front or visible surfaces of the stone. The owner identifies this as an unverified user-attributed 'Under the sea painting' made with acrylic on rock. The piece shows standard craft-level execution consistent with amateur or folk art, displaying natural irregularities in the rock's shape and edges, with an earthy red-toned border framing the painted surface.

Based on what I can see in the provided image, this decorative artwork features a hand-painted underwater scene executed with acrylic paint on a natural stone canvas, complete with a glossy protective top coat. The composition depicts a shipwreck, marine life, and coral formations. The owner identifies this as an unverified user-attributed 'Under the sea painting' made with acrylic on rock. I can't verify from a photo whether the materials or execution hold any greater significance, and I would need physical inspection to confirm the exact medium, age, and condition. Assuming the unverified attribution and craft-level execution are correct, items of this nature typically trade in a modest decorative art market. The basis for the value estimate reflects standard amateur or folk art craft-work pricing rather than fine art investment tiers. General market conditions and demand for unverified rock paintings are typically driven by novelty and decorative appeal rather than secondary market investment. If this piece were to turn out to be a mass-produced reproduction, a replica, or created simply 'in the style of' generic folk art without specific attribution, the value would likely decrease closer to nominal materials cost, roughly $10-$20. To establish any higher value or confirm the precise origins of the painting, what would be needed includes an in-person physical examination by a decorative arts expert, provenance documentation, and careful inspection of the paint layering and edge wear.