River Gemz

River Gemz 💎 Australian Opals – Unset & Set, Sales & Repairs
👩‍❤️‍👩 Family-run by siblings Harri & Marjut + pups Nano & Dewi
🏬 Visit us in Mannum or shop online

02/09/2026

💙 September’s Birthstone: Sapphire 💙

Did you know each month has a special birthstone? For September, it’s the stunning Sapphire — a gemstone loved for its rich colour, timeless beauty and elegance. ✨

At River Gemz Mannum, we have three beautiful sterling silver sapphire options to celebrate September birthdays (or simply treat yourself! 😉).

💎 Two stunning pendants featuring a central sapphire surrounded by sparkling white topaz stones
💎 A gorgeous sterling silver bracelet featuring numerous sapphires arranged in two elegant rows

Whether you’re celebrating a September birthday or looking for a meaningful piece of jewellery, these sapphire designs are sure to impress. 💙

Pop into River Gemz Mannum and discover the collection for yourself!

27/08/2026

✨ River Gemz wishes Laura and Will all the very best for their wedding on Saturday and for the many wonderful years ahead!

A quick polish by Harri brought this beautiful white gold opal ring back to its best, all ready to shine for the big occasion. 💎🤍

Congratulations, Laura and Will! 🥂💍



Our River Gemz customers know that we LOVE our dogs, so it probably comes as no surprise that today we couldn’t help but...
26/08/2026

Our River Gemz customers know that we LOVE our dogs, so it probably comes as no surprise that today we couldn’t help but celebrate INTERNATIONAL DOG DAY! 🐾❤️

From our paw print pendants and earrings to our dog-inspired cheeseboards and handy phone & tablet stands, we love finding ways to bring our four-legged friends into our everyday lives.

Because let’s be honest… life is just better with a dog by your side! 🐶🥰

Happy International Dog Day to all the wonderful dogs — and their humans — out there! 🐾

21/08/2026

Sterling silver pendants each unique with solid [not doublets or triplets] Australian opals available online and in our Mannum store.






11/08/2026

Solid Australian opals set in sterling silver men's rings. Available in our Mannum store and online.

31/07/2026

August birthstone is best known as peridot, a vibrant green gemstone symbolizing prosperity and good fortune.
Whilst we are opal specialists we also have other gems including this selection of peridot sterling silver jewellery.


26/07/2026

Boulder, white and black opals set in sterling silver pendants.

Harri and Marjut are abandoning ship to hit the Caravan, Camping and Outdoor Sale, leaving Nano and Dewi in charge of th...
22/07/2026

Harri and Marjut are abandoning ship to hit the Caravan, Camping and Outdoor Sale, leaving Nano and Dewi in charge of the Mannum store... just kidding, they're not quite ready for that much responsibility yet! But we're sure they'd be delighted to give customers a paws-itive welcome 🐾😂

19/07/2026

Perfect for weddings, school formals, business events, black-tie occasions, or as a thoughtful gift, these handcrafted cufflinks add a distinctive touch of Australian luxury to any suit or formal outfit.

Each pair set with solid natural Australian opals.



18/07/2026

Key-rings/bag-charms with either a solid boulder opal or sold silver animal [platypus or frog] ranging from $33 to $88. Now available in our Mannum store or online.




Address

79B Randell Street
Mannum, SA
5238

Opening Hours

Monday 10am - 4pm
Wednesday 10am - 4pm
Thursday 10am - 4pm
Friday 10am - 4pm
Saturday 10am - 4pm
Sunday 10am - 4pm

Telephone

+61418152950

Website

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