A beautiful gemstone found on planet Pyxl. It has been named after the planet itself, due to being a naturally occuring substance found only on Pxyl; it's very common, and found in numerous, now abandoned mine deposits. Many of them were raw, uncut gemstones, and others were refined and had a handle mounted on the bottom, which could fit on handles of other various objects found. It emits a gentle, colorful light from the core, which varies in color and intensity. The gemstone feels warm when held, at about 14.5 °C. The humans first thought of it as a fire-infused diamond; however, the Pyxinite is nowhere near being similar to the diamond they know, or the fire that exists.
Upon examination, the scientists discovered that the Pyxinite has a molecular structure and composition that doesn't resemble any other molecular structure and composition, particularly those of objects found on Earth. Its molecule is composed of four carbon atoms, four fluor atoms and four atoms of a newly discovered element, which the scientists have dubbed "pyronium", and they believe the newly discovered element is responsible for the gems' constant colorful glow and heat radiation. Pyxinite's molecule has been declared to be C4F4Py4. The atoms of carbon, pyronium and fluor are arranged in a form of an icosahedron. Due to strong electronegativity between the atoms, they are very close to each other and have strong chemical links, rendering the Pyxinite about 13.48 times harder than diamond. The scientists did not find out how were some of the Pyxinite gems refined yet, as even a diamond knife couldn't help alter these gems' shape.
Upon further examination, the scientists have discovered that the Pyxinite's glow depends on absorbed/reflected light and outside temperature; the stronger the absorbed/reflected light is, the stronger and greener the gem's glow gets, and grows weaker and blue in color when exposed to less light, and the higher the temperature is, the more red the glow gets, also becoming blue in color when exposed to lower temperatures. Pyxinite has been found out to have the ability to store absorbed light and heat then radiate them later; if exposed to enough heat and light for long enough, the Pyxinite can emit a strong purple glow in the dark for a limited amount of time, as well as have a core temperature of a hot 32.5 °C. If the heat and/or light the gem is exposed to is really high, it may emit a strong yellow glow and have its surface temperature at a burning 72 °C and core temperature at about 107°C, enough to heat the water to boiling. It has also been discovered that the gem doesn't melt or vaporize, even under ridiculously high heat; therefore, the Pyxinite is deemed unbreakable by any (human) means.
After extensive research, the humans came to a conclusion that this gem has had many uses, from an alien-kind lightbulb, to things like weird-looking knives, termostats, weapons, substitute for fire etc. Apart from its scientific name, the gem has been given other names as well, such as "glowing stone/diamond/gem/crystal", "rainbow diamond", "fire crystal", and "stone of good fortune".
Note: The Pyronium mentioned here has nothing to do with Pyronium from Star Wars. I have taken some insipration from the Dom'Kavash artifact from Freelancer. I also wanted to give a go at animation; this one has 4 frames. I used DB's 16 color palette. I tried my best to have the Pyxinite fit into the challenge as much as possible, and put a lot of effort in it. I hope you like it.
Update 12/19/2013: Some modifications were made; I added a little "shine" to the handle and edited the top, since it was a little distracting...
11 colors: 10 colors + transparency.