Another jewelry item prototype appears, as the first wave continues to succeede.
This one is a pendant, and appears to be called "Sonic Emerald Holding". It's a fully 3D figure in more of the stainless steel material & black patina they've used so far, but this time with the addition of a gemstone of some kind. (It is not labeled as an emerald, probably a green zircon) It's cut to resemble the famous green one out of the 7 chaos emeralds.
A Chaos Emerald is a CLEAR choice, and a great choice for encorporating into jewelry. It's a cool idea! But...this one...is also clearly not their greatest effor. Look at Sonic's proportions! His arms are at least twice as long as his legs & his hands are larger than his head. The body is also very long & oval shaped much more than normal. (Modern Sonic's body is a rough/rounded triangle, classic's is very spherical)

You can see what they were going for.
Triumphantly holding up a Chaos Emerald. But then, you can also see how it would NEVER work & look right. Sonic, by his very design/proportions can't ever reach that much above his head. Let alone to hold a large item like he must do here. If you watch his 3D animations (particularly breakdancing & such) you can literally watch the animators lengthen his limbs temporarily to get him to do moves. Like werehog style bungee limbs because his head is so gigantic & so are his feet. That's OK (ish) in animated media, but it really doesn't work when in permenent/non-moving form. Will this ever actually get released with his long, monkey-arms?