Pinterest • Dünyanın fikir kataloğu

Dolerite dike/sill, on the Island of Ramsö, Sweden. An igneous intrusion of more tubular form.

pin 15
heart 2

Temperaturas medias en la superficie de los planetas del Sistema Solar

pin 886
heart 99

large quartz cluster found in the mountains of Arkansas

pin 546
heart 67
speech 1

Jim Coleman, owner of Jim Coleman Crystal Mines in Jessieville, stands behind a large quartz crystal cluster, only half of which is showing. Clusters of this size and quality have been known to sell for as much as $1 million or more.

pin 663
heart 110
speech 1

GEOLOGIC TIME SCALE ( More people should understand that )

pin 412
heart 38

The Mohs scale of mineral hardness. It was created in 1812 by the German geologist and mineralogist Friedrich Mohs and is one of several definitions of hardness in materials science. The method of comparing hardness by seeing which minerals can scratch others, however, is of great antiquity, having first been mentioned by Theophrastus in his treatise On Stones, c. 300 BC, followed by Pliny the Elder in his Naturalis Historia, c. 77 AD.

pin 451
heart 50
Wereldbol knutselen

Wereldbol knutselen

pin 734
heart 82

solar system coloring page | solar system coloring page & crayons / goodie ... | Preschool Art Pro ...

pin 489
heart 40

List of Rocks | Common rock-forming minerals gemstones are minerals

pin 749
heart 67