The purple book above is winging its way to me from Lithuania. I could not resist the colours because green and purple is my favourite combination. It is A6 size, has 300 pages front and back, and cost £15 which is extremely reasonable. The stones are Malachite.
Below are some more colourways. As you can see, each one is slightly different. Find them here on Etsy – extremely reasonable prices. They also do custom orders.