Yes, marble and onyx belong to the same family of calcium carbonate-based stones, but they have different formations and characteristics. Marble is a metamorphic rock formed when limestone is subjected to high heat and pressure, which causes it to recrystallize. Onyx, on the other hand, is a banded variety of calcite or chalcedony, formed through the deposition of calcium carbonate in cold water solutions like caves.
While they share similar chemical compositions, they differ in appearance and texture. Marble typically has a more uniform look with veining, while onyx is known for its striking bands of color and translucent quality. This translucence makes onyx particularly desirable for decorative pieces, as it can be illuminated from behind, unlike marble.
