Causeway Minerals
Ireland’s Premier Supplier of Fine Mineral Specimens
With over 40 years of passion, expertise, and dedicated collecting, Causeway Minerals connects enthusiasts around the globe with extraordinary, hand-selected natural mineral specimens.
Founded by lifelong collector and industry expert Trevor Boyd, we offer curated pieces ranging from local Irish zeolite treasures from the Antrim Basalt Formation to world-renowned classics from Tsumeb, Ojuela, and beyond. Whether you are seeking iconic wulfenite or expanding your worldwide collection, buy with total confidence backed by decades of specialized knowledge, secure online checkout, and direct customs-free shipping across Europe.
SPHALERITE & GALENA CRYSTALS
A very fine locality example of matrix coated on both sides with large, dark, super bright sphalerite crystals associated with some dull grey cubic galena crystals.
FLUORITE & MARCASITE
An unusual locality example of large cubic fluorite crystals to 3cm on edge displaying nice sharp zoning characterised by lots of small bright marcasite crystal inclusions.
FLUORITE & GALENA
Limestone matrix almost completely covered with fluorite crystals displaying a nice violet colour associated with small, dark grey galena crystals.
Bid on Rare & Curated Specimens
Discover unique natural minerals and hand-selected treasures in our exclusive online auctions. Curated with over 40 years of expert knowledge, every specimen offers exceptional quality for collectors worldwide.
Meet the Expert Behind the Collection
Founded by lifelong collector Trevor Boyd, Causeway Minerals brings over 40 years of passion and senior industry expertise straight to you. Learn about our journey—from local Antrim Basalt zeolites to curating premier worldwide specimens.