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.
When a geode is broken or cut open youâll see amethyst, quartz, agate or other minerals. The outside of a geode is bumpy and might resemble a head of cauliflower covered in dust! NODULES: A nodule is a geode that is completely filled. It looks like a geode on the outside but itâs not hollow.