The factor the gebulkdje and the habut
by the size of the crystals, big crystals intrusive, small crystals extrusive
Crystals can grow from a mineral solution, a magma, or a vapor. The specific conditions under which crystals are formed will influence their size, shape, and quality.
== Grain size. Most intrusive igneous rocks will have visible crystals. Crystals in most extrusive igneous rocks are not easily visible.
The value of a crystal depends upon many things. For example; what mineral it is, size, clarity, quality, whether it's attached to matrix, or associated with other crystals, locality, rarity, etc. So to determine value, you must first determine exactly what you have.
Three things that affect the size and energy of a wave are the wind speed, the duration of the wind blowing, and the fetch (the distance over which the wind blows uninterrupted). These factors determine the amount of energy that can be transferred to the water, resulting in different wave heights and strengths.
Mineral crystal size in a rock can provide information about the cooling rate of the magma or lava from which the rock formed. For example, faster cooling results in smaller crystal size, while slower cooling leads to larger crystals. This can help geologists determine whether the rock formed deep underground (slow cooling, larger crystals) or at the surface (quick cooling, smaller crystals).
The size of crystals in an igneous rock is called texture. Texture can range from fine-grained (small crystals) to coarse-grained (large crystals).
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The crystals will always form according the geometric parameters of the mineral crystal system to which they belong, but the size of the crystals varies depending on the environment in which they form.
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Large mineral crystals that are all about the same size are formed from magma that cooled slowly inside the earth. Small mineral crystals (not identifiable without a microscope) formed from magma that cooled rapidly, on or near the surface of the earth.
because the crystals gradually start to melt.