Which material is the jewelry in the picture decorated with?

Remember finding amber in NZ. Very pretty!

My husband gave me an amber heart necklace on our wedding day. it's such a deep orange color. Like the deep love we've shared these past 25 years.

little b, I like the colour amber and if my husband or one of my kids gave me a piece of amber jewelery, I would most certainly wear it and treasure it.

Kiwozzie, Wow really!! amazing!