THE MINERAL CORUNDUM
In the world of jewellery we all are well aware of the gems that adorn royalty and the elite. Many also associate gems such as rubies and sapphires with astrological connotations thereby giving a mystical aura to these gemstones. But scientifically ruby and sapphire are the same mineral and differ only in color and are simply called Corundum.
Corundum is a very hard, tough and stable mineral, being the second hardest mineral on earth after diamond. Chemically, corundum is unaffected by acids and most other environments. Translucent brown Corundum and Emery are the most common forms of Corundum. The physical attributes of these are most favourable and mined
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Rock Type
Igneous, Sedimentary, Metamorphic
Popularity (1-4)
1
Prevalence (1-3)
2
Demand (1-3)
1
VARIETIES
Emery - Black, massive variety of Corundum, with color caused by mixture of Magnetite, Hematite, and Spinel. Padparadschah - Orange-pink gem variety of Sapphire. Padparadschah is a very rare and sought after variety.
Ruby - Pink to red variety of Corundum. See the gemstone section on Ruby for complete details.
Sapphire - Sapphire refers to all gem varieties of Corundum, excluding the red variety of Corundum which is classified as Ruby. In the gem trade, it refers specifically to the blue gem variety of Corundum, unless a color is mentioned as a prefix to sapphire (i.e. Green Sapphire). Sapphire with a color other than blue is often called a "fancy" in the gem trade. See the gemstone section on Sapphire for complete details. Star Ruby - Ruby displaying asterism in the form of a six-rayed star. Star Sapphire - Sapphire displaying asterism in the form of a six-rayed star.
Ultralite - Incorrect term in the gem trade occasionally used to describe blue
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Another significant Burmese deposit is Mong Hsu, which is currently a major Ruby producer, though its color isn't as fine as the Mogok material. Sri Lanka, especially the area of Ratnapura, Bibile, and Rakwana, is an excellent source of gem quality Corundum of all colors. The finest and largest crystallized specimens and aggregates of gem-quality Sapphire are from Sri Lanka.
Ruby with a brownish tint comes from Thailand, in the Chantaburi District. Fine gem Ruby and Sapphire comes from Luc Yen, Yenbai Province, Vietnam; the Hunza Valley, Gilgit, Pakistan; and Jegdalek, Sorobi District, Afghanistan. Gem quality Sapphire is well-known at Pailin, Cambodia. Translucent to opaque Ruby, sometimes with asterism, is very abundant at Mysore (Mysuru) and Subramanium, in Karnataka, India.
Africa has recently become a significant producer of Corundum, especially in Madagascar, where it is found in the Zazafotsy Quarry, Ambahatraso; and in Andranondambo, Amboasary District. A famous African locality in which opaque rubies are found in green Zoisite is is in Longido, Kilimanjaro Region, Tanzania. Another important Tanzanian Ruby mine is Winza, in
A movie poster is used to pull people in and to make them interested in going to see the movie. The poster for the movie Steel Magnolias, directed by Herbert Ross, simply uses images of the six main female characters. Steel Magnolias is a movie about six women living in the small southern town of Chinquapin Parrish, Louisiana, who share a strong bond of friendship and who must deal with the death of one of one of their friends. The movie reveals the strength and softness of these six women as they deal with the joys and heartaches of life, thus the title Steel Magnolias.
The rocks are pebble to cobble sized basalt fragments. The samples collected ranged from 50mm to 120 mm. The rocks are angular. They have a gray, very fine ground mass. Fine plagioclase feldspars are visible throughout the ground mass and sparkle in the sunlight.
This is because minerals are easy to fracture. They also poses a crystalline structure. Rocks are a mixture of minerals, whereas minerals are their own purest form.
Co-Mo Electric Cooperative is a member owned, electric service program, not for gain. This electric company is owned by thousands of people, and one of the reasons why so many people own co-Mo is because of its benefits for saving money. For three reasons, I will explain how you can save money by becoming a member. First, the Business Energy Efficiency Tips; Low Cost and No Cost Money-Saving Tips gives great examples of how to save energy and lower the cost of your bill. Second, how to avoid the Phantom Load, which is an electrical device that gathers electricity when shut down, even though it is still latched into a wall socket.
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By: Isaiah Thomas What Mike Coffman gave up for his country “10/28/15- Mike Coffman supports lung cancer”. Hold on wait a minute I should probably tell you who Mike Coffman is and how he got to where he is now. Mike Coffman is in Colorado’s 6th District just because he joined the Army, the Army Reserve, the U.S. Marine Corps, and the Marine Corps Reserve, or is there more like the life that he gave up to get where he his now, but what exactly did he give up, and why? First, let’s start off with what did Mike Coffman give up to be able to be in Colorado’s 6th district? At the age seventeen, after finishing his junior year at Aurora Central High School in 1972, he enlisted in the U.S. Army, and he gave up his senior year of high school to
For Sprite trial 3 it started at clear and then went to red, and then to pinkish. For Sprite trial 1 the red gobstopper color went from red, to orange, to whittish orange, back to orange, and then finally to dark orange. For Sprite trial 2 it started at red, then went to whitish pink, to yellow, to light orange, and then orange. For Sprite trial 3 the red gobstoppers color went from red, to light red, to orange, to white orange.
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Its composition consists of Half Dome Granodiorite, which consists of quartz, feldspar, hornblende, and
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