What kind of plastic is this made of?

This is like a hard plastic. They are good for diving in the pool. They do eventually fade from sun and chlorine exposure. Very fun though.

What do the bright color gems look like? I only see pictures of the dull colors from the buyers.

Very bright if the kids have goggles on underwater they'll be able to see them very clearly

I purchased the dull set last august and they don’t look dull for me . They have a shine but no brightness or sparkle, The grandkids loves them 😊!

ASIN	B08QLRTLKM
Amazon Bestseller	#799,570 in Toys & Games ( See Top 100 in Toys & Games ) #180 in Swimming Pool Dive Toys
Batteries Required?	No
Customer Reviews	4.6 4.6 out of 5 stars (2,454)
Date First Available	December 14, 2020
Item model number	38166FR
Manufacturer recommended age	3 years and up
Material Type(s)	Plastic
Model Number	38166FR
Number of Game Players	1
Product Dimensions	3.18 x 20.32 x 22.23 cm; 200 g
Release date	January 25, 2021
Target Gender	Unisex