The June page for this calendar (above, left) has a photo of Kiritehere Beach, on the west coast of the North Island, which Petra and I visited in September 2018, and some of the rocks with monotis fossils that we found there. The rocks on this beach are full of these fossils. I have not tried to tumble polish them. Budleigh Salterton features on the July page (above, right). This village in Devon has a pebble beach full of red iron-stained quartzite stones from the cliffs nearby. We have visited there when we have been in Devon in the past three years. For more detail on Budleigh Salterton and its stones, see the comments on Stone #7 in the post on Twelve Stones, Part Three.
For August, one of my favourite stones appears, banded rhyolite. Stones of this type can be found on beaches along part of the south coast of the South Island, especially around Riverton and Orepuki. The beach featured on the August page is the beach past the Back Beach at Riverton (just beyond the end of the road). September’s beach is another one in the UK that Petra and I visited in 2018, Penmon Point on the Isle of Anglesey in Wales. There I found a black stone with interesting patterned fossils in it (I have not been able to identify the fossils), and a number of limestone pebbles also with fossil shells that are much fainter.
Also see TumbleStone Calendar 2019, TumbleStone Calendar 2019 – February, March, April and May and TumbleStone Calendar 2019 – October, November and December.