The Primal Ices are stacks of:
1st: x1; 4th: x4; 7th: x6; 10th: x9
(total=20 which is the amount for 1x 7% weapon or mystery reskin T6)
The Ornaments are stacks of:
3rd: x1; 6th: x2; 9th: x3
The Mystery ST Shards are stacks of:
11th: x1; 15th: x2; 19th: x3; 23rd: x4; 27th: x5
(total=15 which is the amount for 1x Mystery ST Chest)