The very wise bouncer is right.......fake Thai's are not near as common now as they once were. I have kept 2 examples of fakes from several years ago. The "standard" fake was a little off color, extremely hard......like a rock, the edges were not beveled and sharp, and the shape was irregular from one tab to the next. Lousy fakes, easy to spot. No drug in this one at all.
The second variation was a little better.....good color, shape etc, but a little too soft. Would crush to powder if squeezed between the fingers. (real Thai's will break into several pieces) Might be 1mg methl-t in these.