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Photos enlarged to show detail - see the description for measurements.

These beads are all made using Bullseye glass. 

Pair #1 uses a gradient-like transition in color from pale yellow to orange/red to amethyst to green.

Pair #2 has a base of opalescent (opaque) green with dark red and orange triangles and clear raised dots.

Pair #3 has a clear base with French Vanilla (basically, white) and plum triangles and clear raised dots. 

Pair #4 also has a clear base with yellow and teal triangles and clear raised dots.

The beads in Pair #1 measure 8.5mm from hole-to-hole by 15mm tall. 
The beads in Pairs #2-#4 all measure 7mm from hole-to-hole by 12mm tall.