Weardale Fluorite Bi-Coloured Tumblestone Large Fluorite occurs in many colours and in many locations in the world, however this example is from Weardale in the UK (Greenlaws Hush) and is an ultra-violet sensitive form of Fluorite. This piece is bi-coloured, purple and yellow, it measures approx. 4.2 cms x 3.0 cms x 2.4 cms. Check out my other items ! Be sure to add me to your favourites list ! For UK postage guidance when purchasing multiple items, you will pay no more than £2.95 for up to a weight of 750g (on average a tumblestone weighs 20-30g) - you must request an invoice before paying to get this discounted postage price. For European and International buyers, please also request an invoice before paying as I can reduce the shipping and handling when purchasing more than 1 item.Please remember if you are making multiple purchases to request an invoice before you pay so I can reduce the postage/shipping costs for you.