These are not from alien worlds, just opals mined here on Earth. The opal is basically a hydrated amorphous form of silica, and its water content may range from 3% – 21%. They are 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. Australia produces 97% of the world’s supply, and the internal structure of precious opal makes it diffract light; depending on the conditions in which it formed, it can take on many colors. Click here to view the first image in this week’s funny work pictures gallery. Continue reading for a viral video of an energetic dog teaching a baby how to bounce, or is just trying to pounce on a shadow.