Fine Gemstones & Natural Australian Opal Family-Owned Since 1938

Manning International was founded in 1938 on direct field buying, mining, and cutting of Natural Australian Opal. Our unique heritage still shapes how we source and evaluate every stone we sell today, from opal to fine gemstones alike.

We're committed to accurate representation of origin, content, and quality in everything we offer, worldwide.

Our Products

Close-up of multiple opal stones with vibrant, colorful iridescent flashes, placed on a bed of brown pebbles.

Natural Opal

Close-up of a pink gemstone held by tweezers against a black background.

Natural Gems

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A large, square-cut blue gemstone being held by metal tongs against a black background.

Lab-Created, Synthetic & Imitation Stones

Looking for a stone cut to exact specifications?
Our custom cutting services are built for designers, jewelers, and collectors who need precision for a one-of-a-kind piece in opal or any fine gemstone. Reach out to discuss your project.