Skip to product information
Try On

The Sasha Select Toi et Moi Lab Diamond Round Lab Diamond Engagement Ring in Platinum

SKU: PT18004HIVS-RD150OV100

Sale price $4,290

A striking three diamond line, the center raised, the proportions drawn with intent.

Every measure of it is deliberate, the center lifted to lead, the sides scaled to follow, three lights in a balance that looks effortless and is not.

Platinum. The rarest of the precious metals, dense and cool to the touch, holding its white forever without fading.

Made by hand for her and her alone, to last the rest of your lives.

A lab diamond engagement ring, set with the highest quality diamond made (D color, VVS1 clarity, IGI certified, cut to Hearts and Arrows precision, the rarest a round diamond achieves).

Stone Sizes
Ring Size
7.5 / EU 55.3
Made to Order · 8–12 Business Days
This ring doesn’t exist until you create it. Built entirely in our Los Angeles atelier and delivered insured to your door.

Free insured shipping
40-day returns
GIA / IGI certified
Lifetime warranty
View full details
Made Entirely to Order — Every Time 100% Natural Accent Diamonds Solid Gold & Platinum Only 40-Day Returns IGI & GIA Certified Free Insured Shipping Made Entirely to Order — Every Time 100% Natural Accent Diamonds Solid Gold & Platinum Only 40-Day Returns IGI & GIA Certified Free Insured Shipping Made Entirely to Order — Every Time 100% Natural Accent Diamonds Solid Gold & Platinum Only 40-Day Returns IGI & GIA Certified Free Insured Shipping
The Ring
Setting Style Prong
Sub Style
Metal 950 - Platinum
Band Width
Finish High polish
The Center Diamond
Certification IGI Certified
Color D, the highest grade
Clarity VVS1
Cut Ideal
Accent Diamonds Matched to the center diamond, set when your ring is made
Made In Los Angeles, USA
From Our Clients

4.9 of 5 · 287 Reviews

Write a Review
Exactly the ring I imagined

“I worked with the team for three weeks. They guided me through the diamond, the metal, the proportions — every detail. The day it arrived, I knew she’d say yes. She did. Twice.”

Marcus J. March 2026
The cathedral profile is everything

“We chose the Lumère because it lets the diamond breathe. The center stone is a 1.8ct ROSI™-scored 96 — it sparkles like crazy. The platinum band is comfortable for everyday wear.”

Sarah & David February 2026
Worth every dollar

“I priced this against three other jewelers. RockHer beat all of them on diamond quality at the same price point. The made-to-order timeline was exactly 9 business days. Communication was perfect.”

Priya R. February 2026
Common Questions

About the Sasha Select

Yes. The Sasha Select is a complete engagement ring. Your center diamond is included: IGI Certified, D color, VVS1 clarity, ideal cut, reviewed by our gemologist before it is set.
Every ring is made entirely to order in our Los Angeles atelier. Allow 8 to 12 business days from order to insured shipment.
Yes. Choose any metal option above and the gallery will reflect that variant.
Eligible pieces may be returned within 40 days in unworn, original condition. Review our Return and Exchange Policy for full terms, or speak with your gemologist, we will work with you to find the right design.
Yes. Every RockHer design has a matching band created alongside it. View wedding bands, or ask your gemologist to show you the pairing.