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How do you tell if a rock is worth money?
Quartz rocks are worth money i sold one to a dealer he gave me 35$$.
Which minerals are present in granite but are never present in gabbro?
Never say never, but it's mica.
How do scientists identify minerals?
Scientist identify minerals by Their Special properties. An example of a special propertie is a Chemical Reaction .
Can two igneous rocks be made of the same minerals but have different names?
Yes. The grain texture also matters. For example, basalt and gabbro have the same mineral composition, but basalt, which forms on the surface, has microscopic grains while gabbro, which forms underground, has larger mineral grains.
What intrusive igneous rock is composed of 18 percent olvine 48 percent pyroxene and 34 percent plagioclase?
Gabbro is made of these minerals. The proportions can vary.
How do geologists identify the minerals too small to be seen in a hand specimen?
color streak and luster
What minerals are in granite but not gabbro?
Granite typically contains more quartz and alkali feldspar than gabbro. Additionally, granite may have higher concentrations of minerals like muscovite, biotite, and amphiboles compared to gabbro.
What minerals could you find in a gabbro?
You can find minerals such as plagioclase feldspar, pyroxene, and olivine in gabbro. These minerals are typically dark in color and have a crystalline structure due to the slow cooling process of gabbro forming beneath the Earth's surface.
Does gabbro have a streak?
Gabbro does not have a streak because it is a coarse-grained rock made up of minerals like plagioclase feldspar and pyroxene that are harder than the streak plate. As a result, gabbro does not leave a streak when rubbed on a streak plate.
How identify the coral specimen is hard or soft?
It is difficult or hard to identify a coral specimen
What makes gabbro a rock and not a mineral?
Gabbro is usually made up of minerals such as pyroxene, plagioclase, amphibole and olivine which makes it an intrusive igneous rock.
What is lighter gabbro or granite?
Gabbro is typically lighter than granite because it has a higher density due to its composition of minerals such as pyroxene and plagioclase feldspar. Granite is composed of minerals like quartz, feldspar, and mica, which generally have lower densities.
What clasts would you obtain if you crushed gabbro?
If you crushed gabbro, you would obtain clasts primarily composed of minerals such as pyroxene, plagioclase feldspar, and olivine. These minerals are common in gabbro, which is a coarse-grained igneous rock primarily made up of these mineral components.
How do geologists identifying minerals too small to be seen in a hand specimen?
Geologists identify minerals that are too small to be seen in a hand specimen using powerful microscopes. Minerals are classified according to their physical properties such as color, streak, cleavage, hardness and crystal form.
Can the minerals which form an intrusive rock also form the same rock but is an extrusive rock?
Yes. For example gabbro and basalt are chemically equivalent (and so are composed of the same minerals), however gabbro is intrusive and basalt is extrusive.
Which minerals are found in the igneous rocks gabbro and basalt?
Gabbro and basalt are both mafic igneous rocks and contain minerals such as pyroxene, plagioclase feldspar, and olivine. Gabbro typically has a coarser grain size compared to basalt, which has a fine-grained texture due to its rapid cooling at the Earth's surface.
How are granite and gabbro and diorite similar?
Granite, gabbro, and diorite are all igneous rocks formed from the cooling and solidification of molten magma. They are composed of minerals such as feldspar, quartz, and mica. The difference between them lies in their mineral composition and texture, with granite containing mostly light-colored minerals, gabbro containing mostly dark-colored minerals, and diorite having a balanced mix of light and dark minerals.
