You're probably thinking of Drierite, little blue rocks of anhydrous calcium sulfate with cobalt chloride so that it turns pink/purple when wet.
magma
Try slow heating at a moderate temperature and store in a dessicator.
They are called clastic sedimentary rocks.
when the hot lava cools deep inside the earth, it is called intrusive igneous rocks. when the hot lava cools on the surface of the earth, it is called extrusive igneous rocks.
Any rock created by the cooling of magma or molten material is classified as an igneous rock. These rocks can either be cooled in the earth or on the earths surface. Rocks cooled inside the earth are called intrusive igneous rocks, and have large crystals. Rocks cooled on the earth's surface are called extrusive igneous rocks. These rocks, due to faster cooling times, have very very tiny crystals.
Dessicator is an instrument used in labs and laboratory.
yes there are some rocks that are round called geodes these rocks are hollow on the inside and have crystals inside them
The cast of Dessicator - 2010 includes: Wijnand Geraerts Monique Stoop
Igneous rocks are formed by heat, pressure and cooling. They can be formed inside a volcano or outside a volcano. If they are formed outside the volcano the rocks are called extrusive igneous rocks, like basalt. If it is formed inside the volcano the rocks are called intrusive igneous rocks, like granite.
A round rock with pretty crystals of some mineral in them is called a, "Geode" (jee-owed)
magma
They can be inside some rocks, otherwise called a Geode, They often grow inside caves, and many other places
Try slow heating at a moderate temperature and store in a dessicator.
its called molton rock
Igneous rocks that are formed deep inside earth are called intrusive igneous rocks. These rocks are created when magma cools over millions of years inside earth. As it is cools, elements combine and form minerals. Intrusive igneous rocks are usually identified because they have visible crystals.
holy rocks
It is simply called freeze-thaw weathering.