Opal
Opal is a hydrated amorphous form of silica (SiO2·nH2O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%. Due to its amorphous property, it is classified as a mineraloid, unlike crystalline forms of silica, which are considered minerals. It is deposited at a relatively low temperature and may occur in the fissures of almost any kind of rock, being most commonly found with limonite, sandstone, rhyolite, marl, and basalt. The name opal is believed to be derived from the Sanskrit word upala (उपल), which means 'jewel', and later the Greek derivative opállios (ὀπάλλιος), which means 'to see a change in color'. There are two broad classes of opal: precious and common. Precious opal displays play-of-color (iridescence); common opal does not.5 Play-of-color is defined as "a pseudo chromatic optical effect resulting in flashes of colored light from certain minerals, as they are turned in white light."6 The internal structure of precious opal causes it to diffract light, resulting in play-of-color. Depending on the conditions in which it formed, opal may be transparent, translucent, or opaque, and the background color may be white, black, or nearly any color of the visual spectrum. Black opal is considered the rarest, while white, gray, and green opals are the most common.
The Urban Dictionary Mug
This mug looks great! I love it!
I have a crippling addiction to these mugs, i have 459
This mug is wonderful it’s so funny and I gave it to the kid that made the Definition and he started dying laughing
War. War Never Changes. War, war never changes. In the year 1945, my great-great grandfather, serving in the army, wondered when he get to go home to his wife and the son he never see. He got his wish, when the U.S. ended WWII by dropping an atomic cloud on Hiroshima and Nagasaki. The world awaited Armageddon, instead, something miraculous happened. We began to use atomic energy as a nearly limitless source of power. People enjoyed luxury once thought in the realm of science fiction. Domestic robots, fusion powered cars, portable computers. Then, in the 21st century, people awoke from the American dream. Years of consumption led to the shortages of every major resource. The entire world unraveled. Peace became a distant memory. It is now the year 2077, and we stand on the brink of total war, and I am afraid, for myself, for my wife, for my infant son, because if my time in the army taught me one thing; is that war, war never changes.
Excellent satire - didn't see comments to that end, so find it hard to fathom if most readers, in turn, didn't laugh out loud, and say so. But apparently not.
I am gonna buy it and give it to my nine year old brother
Super Funny Mug 😂
best mug ever spittin nothin but fax
i fucking hate your mugs and shirts
awesome product!
This mug made me to from a Level 1 Crook to Level 100 Mafia Boss instantly. I ascended to the heavens above when it came to the door and God himself told me "your a boss now cuh" and i descended feeling very powerful. Next thing I knew everyone loved me. However 4/5 stars because now I have too many fans and one is holding me hostage.... help
The mug is awesome, the yellow color is great but green is also good, the scream mug is the best mug in my entyre live!!! I can't imagine my life without this mug, i cant stop buing it.... I have like 30 mugs every color in this site and also i'm ordered a new one, please help me.
It is amazing I was having a bad day and I read this. My name is Evan and this made me happy
This mug made me horny.
looks perfect!!! we loved it
I ordered 4 of your mugs -- and have received 3; hopefully, the 4th is on its way! So far, I've received "fame," "620," and "$" ... only needing "hulo." ...It might be a matter of me being patient, that the 4th mug is on its way. However, the 3 received SO far are all EXCEPTIONAL, in every way!!! Mark Moilanen
I love this mug with a burning passion in my heart, I have purchased 7 of these mugs and intend to continue. This mug has changed my life for the better
it's the best mug of the world !!!!!
wow! this mug is so thoughtful to giving to my wife!
The description tells nothing but facts. 5 stars instant
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