In geology pictures of rocks can be used to help you best determine which of the three major types a particular rock belongs to.
Rocks with purple crystal inside.
Look at the crystal using a magnifying lens.
Still others can have agate chalcedony or jasper banding or crystals such as calcite dolomite celestite etc.
Quartz is the most common mineral in the earth s crust.
Pegmatites composed primarily of large crystals such as granite.
By comparing your rock sample with photographic examples you can identify key characteristics such as how the rock was formed what minerals and other materials it contains and where the rock may have come from.
Show the science teacher the stone and ask for their opinion.
All geodes are not created equal the first one is quite hollow but for a nice layer of medium sized blue crystals.
Its rock name is rhyolite porphyry.
But sometimes there are other interesting landscapes inside.
Although fairly rare you can find purple blue or violet minerals in these four types of rocks ordered from most to least common.
Also search for rock crystal or rock and crystal identification websites.
8 years and up.
The colors come from the different minerals that flowed through the bubble so many millions of years ago.
But they were filled with rock crystal instead of amethyst.
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For example the purple variety of quartz is called amethyst and is the state mineral of south carolina.
One of the most common finds when geometric crystals are not present is a geode lined with chalcedony a microcrystalline variety of quartz.
An example is quartz silicon dioxide sio 2.
Break open a gigantic geode this large rock has amazing crystals inside.
The blue crystals attract attention and make llanite an interesting lapidary material.
Most geodes contain clear quartz crystals while others have purple amethyst crystals.
The geode at the left and the one at the top of the page are both dugways from utah.
However as these.
Rich purple amethyst perfect white calcite crystals.
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These dugway geodes have bands of blue and pink.
Purple rocks which may range in hue from blue to violet get their color from the minerals those rocks contain.
Compare it to the pictures of crystals on the internet.
Sunyik natural amethyst quartz crystal cluster druzy geode specimen gemstone sculpture sphere 0 2 0 3lb.
Igneous sedimentary or metamorphic.
Purple crystals tumbled when you look at purple crystals in tumbled form you cannot help but be reminded of the sky s tones of blue and violet during winter.
There is no easy way of telling what the inside of a geode holds until it is cut open or broken apart.
Ask to speak to the high school science teacher.
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Llanite is a rock found in texas and a few other locations that contains tiny euhedral well formed crystals of blue quartz in a groundmass of pink and brown feldspar.
