Girl's best friend apparently

Having another play with macro. Got some extension tubes and not having much fun with them at all! Just can't seem to get the focus right, think that is going to be a very frustrating and time consuming exercise. So back with the filters taking a photo of my engagement ring, interpreting the "rock" challenge to be diamonds! Either side of a Ceylon Sapphire which is actually quite a pretty blue.
I'm not 100% happy with this, so may pop out later and take a pic of an actual rock, we'll see!