Thomas creates lamp finials out of slivers of malachite, howlite
and agate, as well as unusual specimens like inky iridescent labradorite, creamy blue-tinged chrysophase and petrified wood.
This intricate piece by Australian jewellery designer Jessica Lambert was meticulously hand-made using plated copper, dyed pearls, gold plating, brass and howlite
Working in a shop attached to the couple's home, Al says he's partial to howlite
, a stark white rock found mostly around Acton.