<blush> I'm flattered by the comments on one of my cellars. However, the question was Skull Cut Gems, was it not? Here they are, with their values ...
Left to Right, starting with the top row ...
Septarian - Alabaster - Soulpeace - Lapis - Pink Diamond - Diamond - Tiberium - Amethyst - Sapphire - Emerald - Ruby - Citrine
17.830 - 1,640 - 41,110 - 660 - 20,520 - 5,300 - 5,800 - 370 - 1,390 - 650 - 420 - 730
Bottom Row ...
Geode - Soulpeace - Septarian - Luminorious - Soulpeace - Rainbow - Turquoise - Tanzanite - Smoky Quartz - Topaz - Jade - Luminorious
5.920 - 37,640 - 15,810 - 8,,640 - 10,390 - 13,040 - 950 - 2,020 - 490 - 440 - 3,740 - 6,620
The Geode and Septarian skulls came from the usual process: 5 different cuts. So we used Split and Heart cuts, then filled the rest of the 5 first spaces with Split cuts. Then used the last 3 spaces on the Carter XL for the other 3 different cuts, and using 3 different gems to make sure the Geode/Septarian was in the majority. I think what we used affected the final Skull colour.
Hope that helps/encourages?