Crystallization Of An M&M Magma Chamber Lab: Fill & Download for Free

Thanks for the A2A.Kartike Kampassi’s answer is good and has great pictures of what many feel is one of the most beautiful meteorites ever found.Pallasites are primarily composed of olivine and meteoritic iron-nickel alloy. Olivine, a semi-precious stone, is found on Earth in peridotite, which is a major constituent of the Earth’s mantle. However, extraterrestrial olivine is more highly valued than Earthly olivine. Meteoritic iron-nickel alloy is uniquely identifiable as extraterrestrial as the natural content of nickel is much higher than in Earthly iron ores. This high content of nickel in meteoritic iron makes it very rust resistant and thus the beauty of the shiny metal surrounding the olivine stones. Meteoritic iron can remain rust free for millennia while natural terrestrial iron will oxidize (rust) away very quickly.Above, piece of the Fukang meteorite on display at The Natural History Museum, Vienna. Credit: Wolfgang Sauber, CC BY-SA 3.0.The majority of planetary researchers agree that this beautiful mixture of olivine and meteoritic iron was formed after the process of separating out different constituents of an asteroid body but before its core has solidified. Several hypotheses have been made about how pallasites originate: crystallization near the surface of an asteroid that is extremely hot; crystallization of an impact melt; and, condensation of celestial dust particles like has occurred with the planets.The number one hypothesis is that pallasites were formed at the mantle-core boundary of an asteroid that had separated out its different constituents; but exactly how it was formed falls into two camps: first, where the silica melt between a cumulation of mantle olivine is supplanted by molten iron-nickel metal. The second camp proposes that the pallasite is formed by a violent blending of the olivine and metal caused by the shock-wave of an impact event upon the asteroid.An interesting paper has concluded that the Fukang meteorite was formed by the second hypothesis - the pallasite was formed by the shock-wave of an impact event upon the asteroid. [See THE FUKANG PALLASITE: EVIDENCE FOR NON-EQUILIBRIUM SHOCK PROCESSING. D. S. Lauretta, D. H. Hill, D. N. Della-Giustina, and M. Killgore. Southwest Meteorite Center, Lunar and Planetary Laboratory, University of Arizona; Lunar and Planetary Science XXXVII (2006), 2250.pdf]In conclusion, to me, the interesting thing about the Fukang meteorite is that this gorgeous work of natural art was born of a massively violent event between two celestial bodies.

No that isn't true. Well, not entirely true. It's an embellishment on top of an embellishment on top of an embellishment.The original claim, by an Nazi SS tank commander, was that he and his tank destroyed 22 Soviet T-34 tanks in under an hour.The problem with that claim is that nobody can verify it. They can't verify the tally, the types of tanks destroyed — none of it really. It's just an unsubstantiated claim by an SS officer.Whether or not his tank destroyed 2 Soviet tanks, or 22, or 50, or 500, cannot be corroborated because the Germans lost the battle and were overrun by Soviet armor.Russia's military archives were closed to western researchers for more than fifty years after that, and many thousands of records were destroyed in the intervening years, so nobody could ever prove or disprove the claim.You'd think the Red Army might have noticed, and maybe written it down, if SS uber-soldiers (most, if not all, of whom were hopped up on Pervitin — a mixture of crystal meth with a little bit of heroine that the soldiers popped like M&M's because their leaders told them they were “vitamins") were destroying the equivalent of entire battalions every couple of hours.The simple fact that we now know that SS officers were on such hardcore drugs during the war makes the claim specious at best. At least to me.

I own a Ray II and a Flieger. Both are solid-made watches with tough-feeling movement. I once dropped my Ray and it still works perfectly with no scratch at all. The crystal is made of something called “hardened mineral”, which is basically another name for Seiko’s hardlex crystal. These crystals are more scratch resistant than the regular mineral crystal.Many lower-end models are still using pin for the bracelet, so there’s always a risk for the pin to come out, but this is normal for watches at its price. I heard many reported cases of Orient M-Force’s bracelet pin popping out, so if you plan to buy an M-Force, better go for the rubber or replace the bracelet with Nato strap. Never ever dive with a metal bracelet if it uses pins !