Blueglass is a direct copy of the Redglass theme, which is bundled with XFree86 4.3+ and X.org 6.7+. The only change is the colour: this set is blue. Almost every cursor is translucent, allowing you to see what is underneath. Animations have been maintained. Like Redglass, this theme inherits missing cursors from the Whiteglass theme.
If you would like to create your own variation, you may find the source files at http://www.pclinuxonline.com/files/blueglass_xcursor_theme_src.tar.bz2