Advice on making fake gemstones?

Price: $5 USD

Question description

i'm trying to recreate the necklace my favorite video game character wears. it's basically a clear red gem in a metal frame. first i tried epoxy mixed with fabric dye, but it came out rubbery and not see through. i asked a lady at my local craft store what else i could use, and she said triple thick clay gloss mixed with acrylic paint. when i added the paint, it turned pink, then when i added more it became not see through and it still hasn't dried two days later. i did find resin, but it was almost $50, and i really don't want to spend that much. is there another way i could tint the gloss, or is there another cheap material i could use? i also don't have tools to cut/file down premade plastic or actual stones. if it helps for any reason, here is a picture of the necklace i want to make:

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(Top Tutor) Daniel C.
School: UCLA
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