Vintage Amber Brown Glass 3" Disc Saucer and similar items

This is a really interesting art glass item. Not exactly sure what it is and acquired it from a very avid owl figurine collector. Actually, looks like a large owl eye, kinda, in which the center is big and wide round, while the outer half inch or so is darker. Maybe could be a Lense of some sort, really not sure! It is round straight on, yet convex on both sides, coming together in the middle with a thin 1/8" ground smooth edge all the way around. This could be a paperweight, as it weighs 13.5ozs alone, however, it does not have a flat surface to lay flat on, or lay securely. There are some small knicks on the ground thin edge around the item, of which I tried to take photos of. If you know anything about this item, please educate me, as I am clueless and can't find anything close. I take pride in my pictures and are a valuable extension of my description. Please take time to see the product fully. Buy with confidence! All items are packaged with great care and shipped next day, excluding any weekends and holidays. I will combine shipping whenever possible as long as the products can be safely packed together. Please remember to leave feedback, it helps to keep good sellers . International Buyers: We do not mark merchandise as a gift or below value due to it being against US and International Regulations. All custom fees and duties are the responsibility of the buyer. Seller is not responsible for any package held by Customs. If returns are accepted. Must be returned in the same condition as received and in same or similar packaging.