Blue stone pendant with red accent

Lovely silver-plated pendant You can see the 925 stamp on one of the photos. Unsure of stone, possibly blue chalcedony. The red stone is a simulated garnet. I don't have a gem tester, so everything is based on what i can remember when I bought it originally. Feel free to ask questions✉ Will consider reasonable offers🛍 Bundle and save $$ 🤑 🚫NO Trades, so don't ask. All items from a smokefree home but have 2 cats :0)