Opalescent faceted glass bead necklace

I reaaaally don't know my jewelry too well - but thought these glass beads looked old - so spent a few bucks more than I usually would on this necklace. The necklace is 27" long. Both sides of the hook/eye clasp are marked 925. The opalescent faceted beads vary between about 18-20mm long and there are about 40 of them. They have a moderately bright green glow under UV light(except one of them which glows an peach/orange color). Where is this from? And how old are the beads?

 

I recognize most of these beads from bead supply catalogs, the faceted opalescent ones are probably opalite, a quartz, but sometimes simulated in glass.
The cones and clasp are great, I haven't seen those before.

 

I've seen similar ones, all very recent; the idea is as old as time however. The briolette beads could be either quartz or glass, the hearts are agates, and the round white ones look like shell. It was probably made some time in the last decade.

 

Agree with Sandra and evelyb. And yes, agate and shell.
Like the hammered look cones and clasp as well. Probably a hobbyist piece, those hammered findings give it a 'crafty' look.

 

Probably from China. Nicer than some of the items sold through the gift shows I go to. Might be from a jewelry wholesaler who sells to boutique shops.

The hearts appear to be carnelian.

 

These look like a type of onyx

 

Shell beads often look like onyx because they show the cross-section of the shell. You see the different layers that way, just like the striation in onyx.
Here are a few examples of shell beads:
https://www.etsy.com/nl/listing/453...rch_query=round shell beads&ref=sr_gallery_23
https://www.etsy.com/nl/listing/542...arch_query=round shell beads&ref=sr_gallery_3
https://www.etsy.com/nl/listing/549...arch_query=round shell beads&ref=sr_gallery_8

 

The middle bead in that threesome definitely has a look I don't think you would ever find in shell. The layer at the center has the translucent look of chalcedony & is extremely straight & even.

If all those little round beads are stone, the whole necklace must be quite heavy? All the elements in it are things easily found anywhere beading supplies are sold. I think it is definitely a crafts hobbyist piece. The briolettes could be labradorite, which can vary a lot in darkness & colors displayed. Some of the larger irregularly shaped beads that are an orange-y pink look like what is sometimes marketed as watermelon quartz.

 

I am seeing four.

 

It is quite heavy yes (around 9 oz), and it is all glass or stone (except for the small white beads - I believe AJ is correct that they are shell - I scratched one fairly easily with a stainless steel knife.

 

Quite correct, a foursome. I can get tunnel vision when I'm squinting at details. The third one down.

That's a good indicator. It would be unwearably heavy if all stone.

 

Thanks again everyone for your invaluable knowledge and willingness to share it!