The necklace measures about 18 and 1/16 inches long, from end to end, and will fit at about 18 inches long, closed. The chain is approximately 1.5 millimeters, or just under about 1/16 of an inch, wide. (Included you'll see a US Quarter in the photographs, for the measurement-challenged and ruler-averse.) It is stamped, "925 Italy", and signed with a letter N in a rectangle maker's mark, on an inline lozenge. Stamped, "925", again, on the spring ring clasp.
The pendant measures approximately 11/16 of an inch high and wide, hanging at an angle as shown, and just over about 1/4 of an inch thick, not including the hidden bale. The bale opening is roughly 3/16 of an inch, or about 4.7625 millimeters, in diameter. It is stamped, "925 China", on the back, and signed with the same letter N within a box mark as on the chain. Combined weight is approximately 4.4 grams, which includes the crystal weight, of course.
This necklace is in very nice vintage condition, with no kinks or bends. There may be the expected light surface scratches from normal wear, but it appears to have been removed from the box only once or twice. No missing or damaged crystals. Hand polished, but it may have missed tarnish. The clasp works well and holds securely. The box is in pretty good condition, but has a bit of storage wear and soiling.
A very striking, pretty and feminine, vintage yellow gold on Sterling silver and glimmering pave crystal heart pendant necklace in it's original gift box. Rich-looking, boldly sized, showy and pretty.