Here is something to do!
Crystal Caste logo
Owner: Michael Bowling
Crystal Caste is a dice manufacturer from the USA.
The best known dice of Crystal Caste are probably the Crystal Dice (dice in a long crystal shape) and the Dwarven Stones (dice of gemstone and special materials)
They also make regular poly dice. Particularly noteworthy here are the W3 and W30.
There is probably a cooperation with Dice & Games Limited with many dice, since the dice are sold under the same or different name. Manufacturer is definitely Dice_&_Games_Limited