As we've seen here, PolyJet 3D printing has advanced to the point where you can print very detailed opaque objects inside of transparent resin, giving them a suspended-in-ice look. UK-based startup 3Dice has taken advantage of the technology to target the lucrative gamer market, creating transparent dice filled with creatures and objects.
Neat as they are, my main gripe is that they appear a bit difficult to read.
The company calls their dice "perfectly balanced," and insist they "can control and balance the die to minimise imperfections and bias." For those interested, they've posted this 15-minute video demonstrating their balance testing using water and table salt:
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I'm not sure how scientific that is, but it's presumably good enough for the casual gamer.
If this is your thing, sets of 7 dice start at £50 (USD $68) and you can order them here.