Clear fluorite cubes on matrix-‘A929

The image shows a rock specimen with several clear, cubic crystals embedded within a grayish, rough-textured matrix. The crystals are somewhat translucent, allowing light to pass through them, and they appear to have a glassy or vitreous luster. They are well-formed cubes, with sharp, distinct edges and flat faces.
The matrix, or host rock, is a dark gray color with a granular appearance. It seems to be a solid, sturdy base for the crystals. The surface of the matrix is uneven and shows a fine-grained texture. The fluorite crystals are scattered across the surface of the matrix, with one larger, more prominent crystal near the top of the specimen and several smaller ones distributed below it.
The overall specimen is a captivating example of mineral formation, highlighting the contrast between the organized, geometric shape of the fluorite crystals and the rugged, natural form of the surrounding matrix.