Interesting , yet exact age , metal/glass/stone compositions are dang tough to tell from pics !
I'll confess that I am somewhat blue/green 'color-impaired' with the eyes , but those stones in the pendant sure look more like jade/jadite/soapstone (&etc) than turquoise to me , greenacres .
The casting looks very 20th cent. 'common' quality , but not without it's own style !
With ups & downs in the bead trade (recent & antique) of foreign & domestic ... pretty tough to tell ... in the late 90's I bought 2 beadstrands in the junkbox @ estate sale for $2 & got a small handfull of antique beads (that had been restrung on cotton twine) worth much much more ; that being said , there are/have been many Indian export (handmade) beads that can fool the pros .
I'd suggest you get out the loupe & inspect the beads in the strand , & @ least you may be able to say 'handmade beads' .... a good peep @ the 'string' that these are sittin' on might help determine age ...
No real expert on this type of thing , but first impression was that of an import , "head-shop" style .
Lets see what the next has to say !