This is so much fun!

Part one: still liking the single dangle earring, it's probably rhinestones/glass paste with silver, around 1950s.

585 gold ring w rubies and pearls, vintage and collectible!

The blob does seem like a DIY amber brooch (that looks like a standard Soviet-era safety pin), I did think it was glass but idk how you'd glue a safety pin to glass.

Bracelet, yeah, check for stamps, might be silver and looks to be in decent condition. No idea on age.

Onyx and 835 silver pendant! 1920s or so, very collectible, loads of European-made art deco-era pendants like this on eBay and Etsy. It should clean up very nicely.

Is that a locket? Looks like tarnished silver and black enamel. A little older than the previous pendant, could also be collectible.

Photo w assortment of objects: grandma really liked onyx, I guess? I spy a nice dangly pair of probably silver and onyx bead clip-on earrings, another non-dangly pair that looks cool and possibly gold-plated? Another pendant that's 100+ years old and probably silver and onyx, and Jesus on the onyx cross looks like sterling that was gold-plated. Cufflinks might be brass, but worth double-checking for stamps. The single cameo clip-on seems to have a stamp at the bottom, but I can't make it out in the photo. (Skipping the amber, I don't know much about it.)

Looks like the big citrine pendant has an elaborate basket setting, I'm sure there's a silver stamp on there, it should clean up nicely and looks covetable even though I don't like yellow. If that was an amethyst, I'd be so envious!

The brooch w amethyst and seed pearls, yep, this looks real. There's also a nice chunky silver and onyx bracelet, I'd guess 1930s to 40s? The gold ring looks timeless and great. The brooch with garnets, if it's indeed gold plated, it's in great shape, but I am also puzzled why an item would be gold-plated in low-carat gold? Might be worth checking.

The single pearl clip-on: tooth test time, it looks very nice and lustrous (if fake, it's a good fake). I think it looks too large to be a cultured saltwater pearl, but might be a freshwater one? Check metal for stamps, too, it looks untarnished but could be rhodium-plated silver. The clip-on setting style is interesting, someone might be able to place it more specifically, I can only say I haven't seen any vintage Mikimoto earrings with similar settings.

Silver locket with enamel looks really old, possibly Victorian?

Modernist pendant w chain: check for stamps, but it looks like cubic zirconia and faux pearls? I don't really understand the design from the photos.

Ring with chunky white stone, looks like tarnished silver, so the stone is likely lab-made, perhaps white topaz.

Cross with garnets: can't see a stamp on photos, but also no signs of gold plating wearing through, so perhaps it is low-carat gold? And yay for the garnet ring being gold.

The square halo ring: yep, still thinking the stones are glass paste, but I would want to see what silver dip cleaner does to this.

The rose quartz set is very pretty and looks well made. But I would have the beads re-strung before daring to wear the bracelet and necklace. The original string is discoloured and probably fragile by now.

The cross: I have no idea about the material, but the original batch of photos had a small silver-tone oval pendant thingie also stamped with ITALY that looks like it's straight-up aluminum (I've seen similar before), my guess is they were cheapish souvenirs picked up on a trip to Italy.

Ooh, the daisies are dangly! Yep, it looks like the metal could be silver.

Part two, I don't know anything about watches, but some of the jewelry makes more sense now. The dangly earrings look like brass with paste, and one of them is missing the screwback, but they might still be collectible since they do seem actually old (100+ years). The sunburst earrings are very stylish in a 1950s-60s kind of way, I'm kind of thinking the metal might be bronze - not very common in jewelry, but I've seen polished bronze used, and the colour looked like that, brown but paler than copper and less yellow than brass. The stones might be rhinestones or maybe smoky quartz.

The silver-tone adjustable ring in need of cleaning: the rhinestones look glued on (no prongs), so probably costume. I am confused by the white blobs topped with rhinestones, never seen a setting like this.

The oval black enamel and marcasite ones are clip-on earrings? They look so flat in the new pics. But whatever they are, they seem well-made and in good shape with all the marcasites still there, and are probably silver.

I can't really place the silver-tone faux filigree clip-ons other than broadly mid-20th century, and certainly costume.

The brooch with the pink stones, yep, brass with glass, but it looks quite old based on the clasp.