0
Diorite is a dark, granite-textured, crystalline rock that is rich in plagioclase and has a little amount of quartz. Its dominant mineral is the gray or white plagioclase feldspar.
Wiki User
∙ 9y ago
Wiki User
∙ 9y agoDolerite, also referred to as diabase, is a mafic subvolcanic rock. It is composed of plagioclase crystals, augite, olivine, magnetite and ilmenite.
Wiki User
∙ 13y agoLimestone is a sedimentary rock, composed of the mineral calcite (calcium carbonate). The primary source, usually is marine organisms.
Add your answer:
Earn +20 pts
What color is pumice when smashed?
Pumice, being a rock composed of possibly a number of various minerals, does not have a streak color as such. Powdered pumice would reflect a combination of the streaks of the constituent minerals.
Is pumice and obsidian exaples of minerals?
No. Pumice and obsidian are rocks composed mostly of glass.
Whatrock has large minerals grains granite basalt obisdian pumice?
basalt
What is the shape of pumice?
Pumice is a volcanic rock with no inherent mineral crystal shape or formation due to rapid cooling.
What specific type of rock can NOT be formed from minerals?
There are a couple examples. Coal is a rock, but it is organic and so does not contain minerals. Obsidian and pumice are both varieties of volcanic glass. Since they lack a crystal structure, they are not composed of minerals
What minerals does the rock pumice have?
There usually are no minerals in pumice. it is composed of glass.
What are the minerals in Pumice?
There are no minerals in pumice, just glass, but there is a high level of silica.
What is inside pumice?
Air, and pumice. If you want to know what minerals, silica is a big one, 50-70% of pumice is silica. Pumice is cooled magma, so look up the mineral composition of magma for more minerals.
What color is pumice when smashed?
Pumice, being a rock composed of possibly a number of various minerals, does not have a streak color as such. Powdered pumice would reflect a combination of the streaks of the constituent minerals.
Which are not minerals?
Water and air are not minerals; granite, porphyry, clay, pumice are rocks, not minerals.
Is pumice and obsidian exaples of minerals?
No. Pumice and obsidian are rocks composed mostly of glass.
Is pumice natural or manmade?
Pumice is a naturally occurring volcanic rock.
Where can you find pictures of pumice?
The best way to find pictures of pumice is to do a Google search for volcanic minerals.
Does grains have minerals?
No. It is vesicular glass, like pumice.
What are the names of the minerals that make pumice?
Pumice usually does not contain minerals. it is made of glass. A few microscopic crystals of quartz or feldspar may be found here or there in the glassy groundmass.
What minerals are in pumice?
Because pumice is primarily vesicular volcanic glass, it contains no minerals. The ejected molten volcanic rock cooled too quickly for minerals to form. Chemically, it is similar to felsic rock, high in silicon and aluminum.
Which is least dense pumice or galena?
Pumice is far less dense than galena. Galena is one of the densest minerals.
