Platinum Three Stone Engagement Rings
A center held between matching side stones. Each platinum three stone engagement ring setting flanks the center with lab-grown diamond side stones: rounds, pears, princess cuts or tapered baguettes. Shanks run plain, pavé, twisted or split. Pick a setting on this page; the center is matched to it afterward.
$1,519 $3,038
$1,519 $3,038
$1,519 $3,038
$3,229 $6,458
$2,629 $5,258
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Choosing the side stones
- Round sides: the softest match, either touching the center or set slightly apart.
- Pear sides: wide ends curving in toward the middle, tips trailing outward.
- Princess sides: square corners that echo a cushion or princess center.
- Tapered baguettes: long step cuts slimming as they meet the shank, for a crisp Art Deco feel.
The shank beneath a platinum trilogy ring
A plain squared shank keeps attention on the trio. Pavé adds glitter underneath, and split or twisted shanks open up the shoulders. Most designs accept round, oval and cushion centers, and many also take heart, Asscher, radiant, princess, emerald, marquise and pear.
Why platinum
Platinum stays white with no plating and grips prongs firmly, useful on a 3 stone platinum ring where three stones share the top of the shank. Setting prices mostly sit around $2,250 to $2,450, center excluded.
Caring for a three stone setting
Grime settles in the small gaps between the trio. Work a soft toothbrush through them in mild suds, and ask a jeweler to inspect every prong once a year. Platinum mellows to a satin patina with wear, which a professional polish can reverse at any time.
Ring questions, answered.
How do I choose an engagement ring?
Start with the shape she loves, then the setting style. Our gemologists can help you balance carat, cut and budget on a free video call.
Can I build my own engagement ring?
Yes — pick a setting, then a diamond, and review the finished ring before it goes to the bench.
Does the diamond price include the setting?
Diamond and setting are priced separately in the ring builder, and the total is shown before you add the ring to your bag.
How do I find my ring size?
Use our ring size guide, or order a free ring sizer — it arrives in 2–3 days.
Can I return or resize my ring?
You can return it within 30 days (a 10% restocking fee applies to resized or engraved pieces), and your first resize within 60 days of delivery is free.
Should I insure my engagement ring?
We recommend it. Every ring ships fully insured; once it is yours, a separate jewelry insurance policy covers loss, theft and accidental damage.
