About Us

Fine jewellery designed in Melbourne, Australia, with ethically sourced stones traceable to their source.

Oscar & Co creates fine jewellery designed in Melbourne, Australia. We work with lab-grown diamonds sourced only from ethical sources, with traceability back to their origin.

Designed in Melbourne

Our designs pair considered proportions with details that make each piece personal, from a classic solitaire to diamond earrings for everyday wear. Explore the metal, stone and sizing options on each product page to find the piece that suits you.

Ethical sourcing and traceability

Our stones are sourced only from ethical sources and can be traced back to their source. If you would like more information about the stones in a particular piece, contact us before ordering.

Diamond certification

Certification varies by piece and by stone. Each product page states the available certification details, including the grading laboratory and the stones covered where confirmed. Accent diamonds are not individually certified unless the listing specifically says they are.

Here for Australian customers

We offer Australian ring sizing, clear delivery information and support before and after your purchase. Our size guide and care guide help you choose and look after your jewellery.

Every piece is backed by our lifetime workmanship warranty for manufacturing defects. Your Australian Consumer Law rights are unaffected.

For help with a piece, an order or a warranty claim, contact our team.

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Explore the collection and buying guides

Discover our lab-grown diamond jewellery, get help choosing an engagement ring, or compare styles with our diamond stud earrings guide.

Discover your diamond ring

Learn why you might choose lab-grown rather than natural diamonds, then explore our lab-grown diamond engagement rings.