Traonyx: areas of origin, materials and further reading.
Three localities identified by Reza Molai for exploring Iranian traonyx.
A study of samples from Iranian quarries compares travertine and onyx travertine under magnesium sulfate crystallization tests.
It helps explain why porosity, structure and sample testing matter when evaluating stone. Its results do not certify all Traonyx or supplies from Kerman, Isfahan or Yazd.
In Reza Molai’s guide, Traonyx names the commercial category. USGS references provide geological context for travertine and calcareous onyx, including crystalline structures and layering.
Read article ↗USGS describes calcareous onyx as a dense crystalline carbonate, generally translucent and layered. This provides a useful reference for observing stone.
Read article ↗