Epidote is occasionally used as a gemstone.
Rocks with crystals inside worth.
Over time as mineral rich water seeps into the rock it beings to deposit tiny crystals on the sides the hollow cavity.
Inspect the surface for any signs of minerals inside.
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A common stony meteorite called a chondrite can sell for 25 or less but a slice of iron nickel pallasite laced with olivine crystals can easily fetch a thousand times that.
Look for rocks that have a unique bumpy texture on the exterior.
All precious stones are a possible answer to your question they are called precious because they are worth something.
Crystals with small flat surfaces are said to have facets all crystals have a faceted surface but not all crystals have multiple facets.
Epidote is common in medium grade metamorphic rocks as well as igneous rocks that have undergone alteration.
Geodes are rounded hollow voids in rocks filled with crystals and other minerals.
It ranges in color from yellow green to green black to black depending on its iron content.
I bought these rocks from a small etsy shop they claim to have crystals inside when you smash them open.
When you crush a rock its powder isn t always the same color as the rock itself and this powder can help identify the minerals in the rock.
Dea photo 1 getty images.
Many excellent books and websites have been written to help identify crystals on or within rocks.
Geodes in sedimentary rocks are usually found in limestones dolomites and calcareous shale in these deposits a gas filled void can serve as the opening for geode formation.
Sometimes traces of the inside crystals are visible on the surface.
You can conduct a streak test with a piece of unglazed porcelain the back of a porcelain tile is ideal.
Shells tree branches roots and other organic materials often decay away to leave a void for the formation of mineral materials.
The texture of a geode s exterior may have a cauliflower like appearance.
Geodes are rarely perfectly smooth.
Gemmy olive green crystals of epidote.
Collect several rock samples with crystals before identifying them.