Botryoidal Rhodochrosite

Botryoidal Rhodochrosite
You’ve seen how rhodochrosite can grow in bright red transparent crystal clusters. This photo shows the botryoidal form of rhodochrosite. It looks like bubbles of lava coming to the surface. In actuality, the word botryoidal comes from the Greek word meaning “cluster of grapes.” It does kind of look like that doesn’t it? There are lots of minerals and gems that grow in a botryoidal form, I think my favorite is malachite.

According to Wikipedia, botryoidal minerals form when many nearby nuclei, specks of sand, dust, or other particles, are present. Layers of mineral material are deposited radially around the nuclei. As more material is deposited, the spheres grow larger and eventually overlap with those that are nearby. These nearby spheres are then fused together to form the botryoidal cluster.

Author: Michelle M. Rahm is a GIA-trained Graduate Gemologist and is President of Colorado’s Mile High Chapter of the GIA Alumni Association. She has been selling gemstones and jewelry online since 1997. Visit her websites and

About mrahm

Michelle holds a Graduate Gemologist Diploma, Graduate Diamonds Diploma and Graduate Colored Stones Diploma through the Gemological Institute of America's distance education program. Michelle currently serves as President of the Mile High GIA Alumni Association. She also serves on the board of the Rocky Mountain Jeweler's Association and is a member of the American Gem Trade Association.
This entry was posted in Gemstone Tidbits and tagged , , , . Bookmark the permalink.

Comments are closed.