Hey, look what I found. George Sourlis sent me this ad a few years ago because of the California Agates.
Zoom:
Says "imitation leather" and the markings are closer to the top than yours so if it's a photo it's not a match, but it's close. ETA: The font is also different and the Diamond around the G looks narrower. That's starting to look drawn. But if it's all handdrawn and not imposed on a photo, then I'm impressed with the drawing skill!