Platinum Cushion Purple Sapphire Diamond 3 Stone Ring

Suggested Retail: $16,540.00
Our Price: $15,600.00

Long's Signature Collection · SKU: SDR5713

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  • Platinum
  • Sapphire approx. 4.51ctw., side diamonds approx. 0.46ctw.
  • CDC Certified
  • Sri Lanki (Ceylon)
  • One of a kind

At Long’s, our engagement rings aren’t just exceptional in beauty. They’re responsibly crafted as well. With less than 10% of diamonds delivering on our expectations and accepted into our inventory, we take enormous pride in every step of the process – from sourcing exquisite stones, to cutting and polishing, to guiding you to select or create your dream setting. Whether you’re looking for brands that are driving socio-economic change, recycled stones and precious metals, or traceability from mine to finger, we are committed to building a ring that’s reflective of your values – while also ensuring that the final design meets our unwavering luxury standards.

We offer free shipping and returns on orders $50+ within the continental US. If expedited shipping is required, please contact us directly at or 781.262.5854. Orders over $1,000 will require a signature upon delivery.

Most orders should be delivered within 3-7 days.

Store pickup is available on in-stock items, Tuesday - Saturday. For full details, please visit our Shipping or Returns pages.


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Superior Quality

Offering the world’s best brands and high quality pieces destined to become heirlooms

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In business for over 140 years in the Boston area

Outstanding Customer Service

No sales commission means no pressure to buy

Commitment to Excellence

A+ rating by the Better Business Bureau

What Our Customers Are Saying

The only place I’ll ever buy my jewelry. I’ve purchased an engagement ring, 3 watches, wedding bands, and small employee gifts.

- Connor

The place to go when it comes to quality jewelry. Not only do they have excellent standards, but also excellent employees.

- Jessica C.

The service, product knowledge and prices are without compare. If you want a quality product with a quality company, go to Long's!

- Chris A.

Easily my favorite jeweler. I have shopped with Long's for over a year and each time I walk in, I've been welcomed by friendly and knowledgeable staff.

- Andrew

Hands down THE BEST customer service experience I’ve had shopping for jewelry. I wouldn’t go anywhere else.

- Jessica M.

There is never pressure to buy, they truly want the customer to be happy with their choice.

- EmaMay A.