Chaos Emeralds-Blender Test

I created this shader following tutorials created by Learn Together Filmmaking for the diamond material and Mabel Design for the gold surrounding the Emeralds.

I tried to make the emeralds have their colours like in the Sonic games, but I don't know how to change the colour of the emeralds properly, so apologies for the odd clear patches in the Emeralds.

Edit: I have recently done a render of the chaos emeralds in Blender 4.2 using a different crystal material for the emeralds and one of the sample materials for the background provided by Blender. Although the green chaos emerald is showing a prismarine colour rather than an emerald green colour, I do not know how to correct that.

Tutorials used:
-Gold Shader Tutorial: https://www.youtube.com/watch?v=I_wAnH-zXes.
-Diamond Shader Tutorial: https://www.youtube.com/watch?v=BIFs7zwoW2U.
-Diamond Render Setting: https://www.youtube.com/watch?v=3CSn-BQOfXo.
-Attempt 2: Gem Shader Tutorial: https://www.youtube.com/watch?v=2HTPvklPVe8.
-Attempt 2: Vignette Effect: https://www.youtube.com/watch?v=0RyaSB9qyL8.
-Attempt 2: Blender 4.2 Bloom Effect: https://www.youtube.com/watch?v=OhU-GV1CAF4.

Channel Links:
-Mabel Design: https://www.youtube.com/@mabeldesign
-Learn Together Filmmaking: https://www.youtube.com/@ltfilm
-FunWithBlender: https://www.youtube.com/@FunWithBlender_
-PixelicaCG: https://www.youtube.com/@PixelicaCG
-Ryan King Art: https://www.youtube.com/@RyanKingArt