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Jewelry in Portland,

MiaDonna & Company

10250 SW Greenburg Rd Ste. 212
Portland, OR
Services: Jewelry | Login to save vendor
(866) 996-9642

About Us

MiaDonna is a social enterprise changing the jewelry industry by offering the world's finest conflict-free lab-grown diamond fine bridal jewelry and accessories.

We’re putting a modern twist on a ridiculously outdated industry. We’re not your typical jeweler. We believe in creating traditions, not following them. We are advocates for diamond mining communities, the environment and you. Founded by a mother passionate to create change in the world, MiaDonna was established with a single objective: to offer consumers beautiful, ethical and affordable fine diamond jewelry that would help free innocent children oppressed by the active conflict diamond mining industry.

Created in a modern-day lab environment, our exquisite selection of lab-grown diamonds and gemstones are more stunning than anything ever retrieved from the earth and come free of environmental or social harm.

We take pride in leading a new era in the diamond industry. With our proceeds, we fund educational, mentorship, agricultural, and urgent relief programs in diamond mining communities through our foundation, The Greener Diamond.


1.6 out of 5
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  • I bought an engagement ring for my fiancee on MiaDonna's website. The ring was beautiful, and the wealth of information available on their site led me to what I thought was a reasonably-priced ethical option, and taught me much of what I wanted to know about choosing jewelry. On top of that, their mission and cause was moving and ethics was a major factor in the decision. Now for the downside: Their patented Diamond Hybrid simulant is extremely fragile and a poor excuse for a stone. We ended up needing to resize my fiancee's ring twice, and when it was returned to us the stone was loose. I brought it to a local jeweler, who confirmed with a magnifier that not only was it loose, but was loose because the girdle of the stone had been chipped - a part of the stone only exposed during professional repair. Since I had only allowed MiaDonna to handle it per their warranty, the fault lies with them. My fiancee had not even had a chance to wear the ring, a month and a half after the proposal!... Read more

    responded with the following comments.

    Hi Matthew, I am pleased to hear you were satisfied with the quality of the engagement ring setting you received, but apologize that the quality of the center stone did not meet your standards. Had you received the ring originally in damaged condition, we would have supplied a full refund on the ring or stone or both. However, since the ring was outside the 30 days, had been worn, and was resized twice by your request (in your statements regarding repairs I assume the resizing was what you were referring to), this was not eligible for return for a refund. We have a very thorough multi-step Quality Control process for every ring before it ships, but it is possible something like this could have been missed due to human error. We are happy to replace the center stone with a brand new stone if this is damaged whether it was from the resizing, wear, or even if it was done by the third party jeweler - but we would have to review the stone to confirm the damage. As we stated in our response to your original inquiry, if there are chips on the stone, this would be eligible for replacement of the current stone with a brand new one under our Lifetime Guarantee. Our Lifetime Guarantee covers any color change or chipping due to manufacturer defects, as seen by the naked eye, and this information is not hidden in fine print but clearly stated in the third paragraph on our warranty page ( While it sounds like the chip on the girdle is not visible to the naked eye as you were shown it under 10-20x magnification, we are happy to make an exception and replace this for you complimentary, covering the shipping costs and doing a thorough inspection before it is sent back to you.

    Frequently Asked Questions about Jewelry

    Which of the following services do you offer?

    Cleaning, Payment Plans, Ring Sizing, Shipping, Stone Upgrades, Warranties

    What kind of jewelry do you offer?

    Antique Accessories, Antique Engagement Rings, Antique Wedding Bands, Costume Accessories, Custom Accessories, Custom Engagement Rings, Custom Wedding Bands, Designer Accessories, Designer Engagement Rings, Designer Wedding Bands, Handcrafted, Loose Diamonds, Ring Setting

    What is your average turnaround time for an engagement ring?

    1-2 weeks

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