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Custom Montana Sapphire Ring in Gold

Design your custom engagement ring with the Montana sapphire of your choice. Your ethical dream ring, made to order, just for you.


  • 18 karat yellow, rose or white gold
  • Our signature ethical gold: mercury-free and mined by indigenous women who are paid more than the international gold price
  • Ethically sourced sapphire from Montana, USA - September birthstone
  • A fully customized piece
  • Made to order in 8 to 12 weeks, plus shipping 

Choose your sapphire to see more photos:

Email us for help and personal concierge service

Custom Montana Sapphire Ring in Gold

Design your own Montana sapphire engagement ring or self love ring. 

Choose a Montana sapphire that speaks to you and let's get started!

We’re making this for you, from scratch

Your custom Montana sapphire ring will be made to order with the Montana sapphire stone of your choice in around 8 to 12 weeks. You'll receive a photo before we ship it out. The price is for one finished ring in 18 karat eco gold.

Since your Montana sapphire ring will be made especially for you, we don’t accept returns on custom orders. You can read our return policy here.


Sapphire is the September birthstone. This original love rock is a powerful stone to gather strength. Sapphire symbolizes wisdom, loyalty, and faith. She was once believed to protect your loved ones from harm.

At first glance, sapphire gleams with power and strength, but her true colors shine within kindness and hope – that’s the stone’s real secret sauce. Sapphire lets us get real because she offers great wisdom of intuitive truth, insight, and healing. A symbol of friendship and peace, and a shield from negative energy

Sapphire is a durable gemstone with a hardness of 9 on Mohs scale of hardness. It’s suitable for everyday wear and as an alternative engagement ring.

Your custom ring design


You can choose from 18 karat yellow gold, rose gold or white gold. We use 18 karat ethical gold, which is mined and processed with traditional, mercury free, low impact practices by indigenous Dayak women in Central Kalimantan, Indonesian Borneo, who receive fair pay. Our white gold is rhodium plated.

Ring size

We use US ring sizes.


You can choose between a bezel setting, which has the gold all the way around the stone and a prong setting, where small claws hold the stone. Not sure which setting is right for you? Compare bezel vs prong setting here.

Diamonds in band

Want to add some extra sparkle? Pave diamonds in the ring band can really elevate the look of your ring. Choose between salt and pepper diamonds (the rebellious budget option) or white diamonds (G-H color, SI clarity).

Engraving is on us

We offer complimentary engraving on the inside of your ring to personalize it even more. Our team will reach out to you after your purchase for details.

Conflict free diamonds

The diamonds used in this jewelry have been purchased from legitimate sources not involved in funding conflict and in compliance with United Nations resolutions. Based on personal knowledge and/or written guarantees provided by the supplier of these diamonds they are conflict free and mined in accordance with the Kimberley Process.

Gardens of the Sun goes beyond conflict free. Since our sourcing policy came into effect in November 2018 we only purchase diamonds from known origins. We avoid sourcing diamonds from Angola, Democratic Republic of Congo, Ivory Coast, Liberia, Russia (last purchased in 2019), Sierra Leone and Zimbabwe.

Is it a Montana sapphire engagement ring?

Are you planning on using this as an engagement ring? Ask us to keep the exact measurements of your diamond. This way, if you decide to also get a wedding band or nesting band from us, we can help make sure it fits perfectly.

Need any help?

Want advice on which stone to choose, some guidance with the design, or a mock-up before taking the plunge? Our customer happiness team is pretty awesome! Contact them for help.

Any special requests for your ring band, stone angle or prong placement? Write them down in the box at checkout.


Montana sapphire for you to choose from

MS7 - 0.36 ct white sapphire with light blue dispersed throughout. The beauty of this sapphire is magnified by the magnificent cut. Unheated sapphire, mined in Rock Creek, Granite Co., Montana. Measures 4.1 x 4.1 x 3 mm.

MS14 - 1.45 ct pale golden blue Montana sapphire with small inclusions. The entire stone is shrouded in a clouded mistiness to it to the point where it has an almost opalescent glow. Missouri River, unheated, cut in Sri Lanka. Measures 7 x 7 x 4.1 mm.

MS15 - 1.09 ct light blue sapphire. The Missouri River, unheated, cut in Sri Lanka. Measures, measures 6.5 x 6.5 x 3.5 mm.

MS22 - 0.96 ct a cloudy and silky light blue sapphire with warm yellow patches. Mined around the Montana Missouri River, unheated, cut in Sri Lanka. Measures 6.1 x 6.1 x 3.6 mm.

MS28 - 0.43 ct icy pale yellow sapphire. It's like white sapphire, but with a slightly yellow glow. Missouri River, unheated, cut in Sri Lanka. Measures 4.7 x 4.7 x 2.6 mm.

MS31 - 0.23 ct light yellow and blue hexagon cut sapphire. Vintage Montana stock, heated. Measures 3.6 x 4.1 x 2.2 mm.

MS32 - 0.23 ct yellow and blue sapphire. The dispersion of color makes the stone appears vibrant blueish green. Montana, heated, hexagon cut. Measures 3.4 x 3.8 x 2.2 mm.

MS37 - 0.37 ct yellow hexagon sapphire with some blue around the girdle and a defined black pepper inclusion. Heated. Measures 4.2 x 4.2 x 2.7 mm.

MS39 - 0.34 ct wonderful green octagon sapphire from Montana. Heated, measures 4.1 x 4.1 x 2.6 mm.

MS41 - 0.70 ct heavily included icy sapphire from Montana, with some wicked copper colored needles. Heated, measures 5.24 x 5.24 x 3.71 mm.

MS48 - 0.44 ct emerald cut blue sapphire. This emerald cut sapphire is sweet and soft, like a lazy day spent in a cocoon of blankets and pillows. Measures 4.46 x 4.06 x 2.82 mm.

MS52 - 0.68 ct blue Montana sapphire. A swirl of blue ink in water, this Montana sapphire is bursting with creativity. With a bubble floating towards the surface. It might be an imperfection, it might be a gem of an idea. Measures 6.40 x 4.33 x 3.04 mm.

Customer Reviews

Based on 213 reviews
Jenna S. (Georgia, United States)
Best experience EVER

This was the best experience I’ve ever had buying jewelry. The customer service is IMMACULATE! They even offered to hold my ring while I went on a trip to make sure it arrived while I was home.

Then we get to the ring and it is even more gorgeous than I could have imagined. The quality is immaculate. The ring box is beautiful and it includes a tiny flower which is the best little touch!! I will absolutely be purchasing more from Gardens of the Sun

Cassandra O. (Quebec, Canada)

Your team treated me like family and gave me a wonderful experience, my engagement ring is better than I could ever imagine because of you guys I'm so grateful xx


Ciara R. (Nevada, United States)
The perfect engagement ring!

My fiancé and I picked out my engagement ring from Gardens of the Sun and I couldn’t be happier with it. The process of picking out the stone, setting and band was so much fun, and the team at Gardens of the Sun was so helpful in sending pictures and mock-ups! I’ve received so many compliments on my ring, and it’s so beautiful and unique!

Heléne (Kronoberg County, Sweden)
Easy process and good advice

I have only the best to say about the company and the special piece for myself that I created with them. It is every bit so special and beautyful as I could hope and expect. And the customer-service is flawless with quick and easy contacts and good advice (especially since I got second thoughts about wich size to choose).