A. Rock has sparkly or alternating color layers that are bent or folded.
B. Rock has layers and smaller pieces of rock in it. It also has fossils in it.
C. Rock has holes in it, and it has a glassy appearance.
D. Rock contains mineral crystals that have grown together.
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Granite is a coarse-grained igneous rock that typically consists of quartz, feldspar, and mica minerals. It is known for its speckled appearance and can vary in color from white, pink, to grey. Granite is also very hard and dense, making it a popular choice for countertops and building materials.
In a hand sized sample, granite would have visible crystals of white to pink feldspar crystals, black specks of mica or hornblende and grayish smaller bits of infilling quartz. In a weathered outcrop, granite will form structures called tors which have a rounded appearance due to exfoliation.
Limestone will fizz when vinegar is applied. Sandstone will not. Sandstone is usually composed of visible grains of sand which feel gritty to touch. Limestone is not composed of sand grains and generally does not feel gritty to touch.
Sandstone is made up of grains of sand and when you rub it against another rock little bits will come off.
The granite would be older because it had to form first in order for the sandstone to contain pieces of it. The sandstone would have formed later on top of the granite layer.
If a granite rock is made of smaller crystals, it would be called fine-grained or fine-grained granite.
Obelisks are typically made of a single piece of stone, such as granite, marble, or basalt. These stones are typically quarried and then shaped into the tall, four-sided monuments we recognize as obelisks.
A batholith would likely be a better buy for mining granite as it is a larger, more extensive body of granite that would likely contain more valuable resources. Sills are smaller, more localized bodies of granite and may not provide as much material for mining.
Stone Mountain in Georgia, USA is not the largest piece of granite in the world. It is a prominent landmark and does contain one of the largest single masses of exposed granite, but there are larger granite formations globally.