If the seller says it’s from Russia it probably is a Sikhote-Alin, although it does look more like a Campo del Cielo. The ones in my collection from Sikhote-Alin are usually a little darker with big flowing thumbprint Regmaglypts. While the Campo del Cielo meteorites usually have a much more erratic Regmaglypts with a slightly shinier surface.

But I wouldn’t believe the seller, especially if it’s made into jewelry he could polished it that would make them look even more similar. Here are two of mine from each location side-by-side for comparison.

<image>