Highly detailed scientific watercolor illustration of three rounded, smooth, river-worn stones stacked vertically on top of each other on a perfectly clean pure white background. The stones are completely opaque, softly curved, with no sharp edges, and display the natural saturated colors of precious gemstones without transparency: bottom stone in deep ultramarine lapis-lazuli blue with subtle golden mineral speckles, middle stone in dense cobalt sapphire blue with matte mineral grain, top stone in deep velvety ruby red with soft stone texture. From the surface of the top stone only, several real, naturally existing mushrooms grow. The mushroom caps (umbrellas) appear clearly moist and hydrated but not dripping, rendered with fine watercolor washes, subtle satin highlights, and delicate surface humidity. The stems are fleshy, slightly translucent, and organically curved. Strong visual and material contrast between the heavy opaque mineral stones and the soft living fungal tissue. Painted in the style of classic scientific botanical and mycological illustration, ultra-fine brushwork, controlled pigment diffusion, visible paper texture, soft edges with precise contours, natural color calibration, high-detail observational realism, museum-grade scientific watercolor plate, no stylization, no fantasy mood.