Thought I would share the different results I got using the three different types of isomalt.

I used all three types for a recent groom's cake for the ice cubes. 

The "Crystals"  created a glass-like result...great for jewelry.

The "Nibs" & "Sticks" created a smokey-type effect.   My opinion what real ice cubes look like.

So, my opinion, if you want to make jewelry....buy the crystals.

The nibs/sticks make real looking ice cubes.

The nibs/sticks are used by microwaving...the crystals are used on the stove in a pan with a candy thermometer.

They also don't go very far either.   A package of the crystals made 12 good ice cubes.   Had some left over in the pan but it got too thick to pour and when I slightly reheated it to get it out of the pan...they were amber colored.

Good to know - the bag of nibs that I have is only a 7oz bag, so it doesn't look like it would go very far. :)