First you need a hollow rock.
Round rocks with crystals inside.
You can also shake the rock next to your ear to test whether it is hollow.
If the rock feels lighter than that surrounding rocks it may be a geode.
Crystals with small flat surfaces are said to have facets all crystals have a faceted surface but not all crystals have multiple facets.
The only difference between a geode and a nodule is that a geode has a hollow cavity and a nodule is solid.
A geode is a round rock which contains a hollow cavity lined with crystals.
Geodes have a hollow space inside which is what allows the crystals to form.
Geodes are generally round though some are egg shaped.
Geodes start their lives as a hollow bubble inside a layer of rock.
There are two basic types of geode.
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.
The crystals are formed by the filling of vesicles in volcanic and sub volcanic rocks by minerals deposited from hydrothermal.
Test whether the rock has a hollow interior.
They can range from the size of a nut to several feet.
Most geodes are approximately the size of a basketball.
Shells tree branches roots and other organic materials often decay away to leave a void for the formation of mineral materials.
How do you get a hollow rock with lots of sparkling crystals inside.
Many of these crystals can be quite beautiful such as the purple quartz known as amethyst.
Sedimentary rocks such as limestone or shale are hardened sediment with sandy or clay like layers strata they are usually brown to gray in color and may have fossils and water or wind marks.
Collect several rock samples with crystals before identifying them.
Geodes derived from the greek word γεώδης meaning earth like are geological secondary formations within sedimentary and volcanic rocks geodes are hollow vaguely spherical rocks in which masses of mineral matter which may include crystals are secluded.
How are geodes created.
Geodes with volcanic.
I bought these rocks from a small etsy shop they claim to have crystals inside when you smash them open.
Many excellent books and websites have been written to help identify crystals on or within rocks.
Igneous rocks such as granite or lava are tough frozen melts with little texture or layering rocks like these contain mostly black white and or gray minerals.
Those formed from volcanic rock and those formed from sedimentary rock.
Hollow rocks so let s start at the beginning.
