Kentallenite from Kentallen, Scotland rock thin section Coaster (C61) £4.00 Quantity: at £4.00 each Add To Basket A thin rock section of Kentallenite was viewed using crossed polarising filters. This is an igneous known locally as ‘Black Granite’ Contains olivine, pyroxene, biotite and feldspar. From Kentallen, in the Great Glen, Lochaber. Not known elsewhere. 90mm square coasters printed by dye sublimation to give a vibrant, high gloss, scratch resistant finish. Supplied with a description on the back of the coaster. Free UK delivery on orders over £10 (£1 delivery charge for orders below £10). Delivery charges for overseas orders are calculated in the shopping basket. Please note these coasters are printed to order so will be despatched within 4 working days of order being received.