A Bakerâs cyst is also known as a popliteal cyst or synovial cyst. It is a soft, fluid-filled lump that forms on the back of the knee. The lump is sometimes mistaken for a blood clot.
Geodes are typically agates. Agates are very common stones, and usually do not fetch a high price, but they are gorgeous to look at. Geodes in particular can be quite incredible, because they are like little miniature caves. On the outside, they look like plain, rough stones.
A cut and polished chalcedony geode. A form of fine-grained quartz that is nearly transparent or has a milky translucence; it fractures conchoidally. 2012 March 1, Lee A. Groat, âGemstonesâ, in American Scientist, volume 100, number 2, page 128: Although there are dozens of different types of gems, among the best known and most important are [â¦] .