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spinel
[spi-nel, spin-l]
noun
any of a group of minerals composed principally of oxides of magnesium, aluminum, iron, manganese, chromium, etc., characterized by their hardness and octahedral crystals.
a mineral of this group, essentially magnesium aluminate, MgAl 2 O 4 , some varieties being used as gems.
spinel
/ ɪˈɛ /
noun
any of a group of hard glassy minerals of variable colour consisting of oxides of aluminium, magnesium, chromium, iron, zinc, or manganese and occurring in the form of octahedral crystals: used as gemstones
a hard, glassy mineral composed of magnesium-aluminium oxide found in metamorphosed limestones and many basic and ultrabasic igneous rocks. Formula: MgAl 2 O 4
spinel
A hard, variously colored cubic mineral, having usually octahedral crystals and occurring in igneous and metamorphosed carbonate rocks. The red variety is valued as a gem and is sometimes confused with the ruby. Chemical formula: MgAl 2 O 4 .
Any of a group of minerals that are oxides of magnesium, iron, zinc, manganese, or aluminum.
Word History and Origins
Word History and Origins
Origin of spinel1
Example Sentences
The red spinel on one of the necklaces — which also converts into a tiara — acts as its own version of the black and white spiral patterns used by hypnotists, affixing the eyes.
As an example, production of the high-pressure spinel polymorph of Li2MoO4 was only previously achieved in a high temperature and high-pressure chamber under a pressure more than 10,000 times the pressure of Earth's atmosphere.
The crown glitters with stones including tourmalines, white and yellow topazes, rubies, amethysts, sapphires, garnet, peridot, zircons, spinel and aquamarines.
It is made from a gold rod in three sections, mounted with diamonds, rubies, emeralds, sapphires and spinels.
These objectives earn you special “spinel” jewels to trade for rare items from the iconic undead merchant, who this time has an even heavier, cartoonish cockney accent.
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When To Use
Spinel is the name for a kind of mineral and a variety of the mineral that’s used as a gemstone, especially a red-colored one.The word can be used to refer to a gemstone, as in I want a ring with a spinel, or the mineral material, This is made of spinel. It’s sometimes spelled as spinelle or spinell.Spinel can come in deep or pastel shades of red, pink, purple, blue, and black. Black spinel is rare and very valuable.The red variety is similar in tone, color, and transparency to rubies, the blue variety is similar to sapphires, and spinels are sometimes mistaken for or sold as a less expensive substitute for these more expensive gems. Some famous gemstones once thought to be rubies have actually been correctly identified as spinels.Spinel is one of the birthstones for the month of August. It is associated with the zodiac signs Leo and Virgo.Example: Most people think the stone in my ring is a ruby, but it’s actually a deep red spinel.
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