Made by Tono and hallmarked properly and with eagle 1 and design number 153. The o in Tono is hard to see in the pix but is clear on the piece in person. The hallmark is on both sides of the female end of the clasp. Tono made quality, well designed pieces. This necklace is made of many, many gemstones of all colors and types. Each one has been hand set on a square cubed thick chain and each is secure in its mounting. The condition is perfect. It handles smoothly and does not kink or get caught up in itself. It is masterfully made and the design is well thought through. The end result is a rope of gemstones that look incredible with virtually any color you put next to it. The weight is 153 grams heavy and the length is 16.25in. The width is 1in. and it has a depth of .5in. This is a rare find, just LOOK AT THAT NECKLACE!