ROCKS & METALS.

Earth surface is solid and cold, while under the surface by several kilometers, it's very hot and metals take the liquid form, known as "lava", which is a combination of molten metals and rocks altogether in rivers and lakes near Earth's core.

Granite.

 sometimes the Lava leaks into Earth's surface and converts into igneous rocks, then cool down and takes a solid form. one of the methods that help Lava reach the surface is through volcanic nozzles when volcanoes eruption happens, the released lava cool down so fast and form several types of rocks, like Basalt, rocks are formed of a very small object called "Crystals". the rocks that were formed from the "Lava" which were released from a volcanic eruption have a small Crystals,

Quartz.

 but the rocks that were formed from earth cracks have bigger Crystals because it takes a longer time to cool down and become solid, like "Granite". Igneous rocks evolve from several sorts of rocks that could be categorized into two types: Sedimentary rocks and Metamorphic rocks. ancient rocks crumble and get corroded by the effect of rain, wind, ice, seas & rivers, then ends up in ocean bottom for example. Across millions of years, these rocks are stacked up and stick together to form sedimentary rocks,

Limestone.

Sandstone and clay are basic forms of sedimentary rocks, Sandstone confronts of medium size particles, but clay is formed of very small particles. some sedimentary rocks are formed of remains from oceanic animal skeletons lived in the ocean millions of years ago, like Limestone and calcareous. Metamorphic rocks are formed under the extreme heat of fossil and sedimentary rocks, the heat source often comes from a volcanic eruption.

The Orkney Islands, Sandstone contains
levels of aggregated levels of Calcite,
Limestone & Calcium Carbonate,
North Scotland.  

Marble is a converted rock from Limestone, Slate is a converted clay, a lot of converted rocks contain big Crystals of precious stones like agate and sapphire. almost all rocks are formed from big chemical materials called "Metals". Quartz is a common element in most rocks, also the sand on the beach is softened quartz by the effect of Tides, also Gravel on the beach is softened by the sea waves across millions of years. the dark color in most rocks that we notice in it because it contains metals in its formations, like iron and magnesium. Olivine and Hornblende are types of rocks with metal combinations. Calcite is from Limestone and calcareous, its formed of Calcium carbonate which is the material that covers the inner crust walls in boilers.

ِAmber.