Cotter & Co is an Irish online jeweller specialising in certified engagement rings, diamond wedding rings and bespoke fine jewellery. Every piece is personally sourced by a Graduate Gemologist ( HRD Antwerp) with over 25 years' experience purchasing and  grading diamonds, so whether you choose a GIA-certified natural diamond or an independently certified lab-grown diamond, you're buying with expert guidance at every step. We offer free resizing, secure delivery across Ireland, and a bespoke design service for couples who want something truly personal.

Certified diamonds • Bespoke design service • Based in Ireland