1 - w/ Silver Foil (encased), 2 - w/ Silver Leaf, 3 - w/ Silver Leaf (reduced & encased), 4 - w/ Silver Glass Frit (reduced), 5 - w/ TerraNova2 Frit, 6 - w/ Silver Glass Frit Stringer (encased), 7 - Plain, 8 - Plain (reduced), 9 & 10 - w/ Tuxedo, Copper Green, Opal Yellow, Ivory and Peace
CiM Caribbean is a pretty medium blue colour, a touch darker than Effetre Medium Blue, and quite a bit lighter than CiM Sapphire. It also seems like it might be a hair on the greener side than Sapphire is. It is a pretty colour that is fairly stable, not reacting strongly with other colours.
I found Caribbean a relatively pleasant colour to use, although it is a little easier to boil than I really like. Working higher up in the flame solves this problem. I only really had trouble with it when I was using it as stringer or heating the end of the rod specifically to make dots.
Silver Foil stays mostly silver when it is encased with Caribbean, although you can see that there are a couple of gold patches in the left-most bead. Putting silver on top of Caribbean makes it darker. The bead on the middle here is far darker in colour than the bead with the silver foil in it, with smudges and sprays of silver wandering over its surface. When this combination is reduced and encased, the Caribbean lightens back up so that you can see through it again and the silver takes on all kinds of attractive blue colour.
These last two reactions are pretty similar to what I experienced with CiM Sapphire.
Silver Glass Reduction Frit is pretty on top of Caribbean, but I didn't get much colour out of my TerraNova2 Frit on top of it. The bead with the silver glass frit stringer is interestingly streaky, but I didn't get any really interesting effects in it. In terms of the reactions I have seen with other colours, this one was only moderately successful.
Unlike Sapphire, Caribbean does not turn orange when used on top of Copper Green. It does develop a faint dark line reaction with Ivory, and it almost disappears on top of Peace.
Tuxedo is faintly translucent on top of Caribbean, Copper Green turns shiny and orangey when used on top of it. There were no really obvious reactions when Opal Yellow, Ivory or Peace were used on top of Caribbean.
Some fun beads with Caribbean: