Versamagic is a pigment CHALK ink by Tsukineko.
The same company also makes VersaMark, which is a clear, watermarking ink.
Versamagic: colored, faster drying pigment ink (due to chalk-like formula), many beautiful shades. Can be thermal embossed if the pad is well inked, and you work fast.
Versamark: clear, creates an impression one shade darker than whatever color paper you stamped it on. Remains wet long enough to be thermal embossed as well. My preferred for embossing with opaque powders, clear powder, and sticky embossing powder. Must be embossed on vellum and other non-porous surfaces, or it will never dry.
HTH,