That looks great!!! Well done!

I suggest you ring the Feast Watson support line and ask them and let them know what type of wood it is, eg solid or veneer and what type. I had such a difficult time deciding what to use on my wood benchtops in the kitchen, the product I used is perfect. I consider aftercare a big factor and the product support person helped me decide because of the ease of maintenance re accidental scratches etc.

Got my answer - non combustible material such as, natural stone - marble, granite or concrete etc.

I'm not sure whether you live in a city or regional area.....I guess more available in a city area. If it interests you just google glass hearth images. Then you can get an idea of what it looks like and whether a glass hearth would appeal to you. You don't need any substrate under the glass and I think generally they are recommended to be 12mm thick so not too thick and chunky. And also can be shaped depending on what you like.