1970s Lighting Prism Part Pair Cast-Metal Hardware & Cut-Crystal Decor Lamp ? Ceiling Light Fixture ? Sconce ? Tassel DIY 2pc buying SET Vintage

This one has me stumped. I believe they are vintage (probably 1970's), decorative, lighting parts, but I cannot be sure. They could be from a ceiling fixture, lamps, wall sconces or none of the buying above. They are very heavy and each measures approximately 1.75 x 7.5 inches in size. They are made of gold-tone, cast metal or brass and have a large, cut-glass (not lucite) center which looks to be a light-green color not clear. They have a decorative loop at the top and finial at the bottom which does not attach to anything. They appear to have been made as a hanging decoration as there is a chain part remaining at the top of each which is black in color and not gold. They are in good condition, but with an aged patina and areas of slight discoloration. I am sure this item can be repurposed or perhaps you have the lighting that these belong to. You could also make these into decorative, beaded tassels such as the one shown in the last photo which is not included in this sale. Please be sure before purchasing as this item is not returnable.