Nice finds. I've had a couple silver come in a bit low for some reason - one was a tone average, the other wasn't. I figured out that the other wasn't a tone average by setting the item back down on the ground, and sweeping my coil over it. It didn't matter what it was on, soil, wood, back porch, etc., it still had the low tone but was .925 silver. That's the only way I know how to learn about the various shapes giving different tones; shape, size, material all have their influence on the tone. I had read about that, but hadn't experienced it. That's only happened maybe twice or three times to me though. With shapes like that ring, I usually get a good silver sound, and then distortion where the woven part is, even if it is a high tone. But this one ring in particular has some tall prongs that hold the stone, and I figured that's what was doing it. Always more to learn... Congrats on the finds!