Lumen Lab Diamond Solitaire

Rated 5.00 out of 5 based on 2 customer ratings

(2 customer reviews)

$1,250.00

A 0.75 ct lab-grown round diamond in a low, snag-free cathedral setting.

Size guide

Ring size guide

Find your US ring size by measuring a ring you already wear or the base of your finger. Between sizes? Choose the larger one, especially for bands wider than 4 mm.

US size	Diameter (mm)	Circumference (mm)
5	15.7	49.3
6	16.5	51.9
7	17.3	54.4
8	18.1	57.0
9	18.9	59.5

Diameter
Place a ring that fits well on a ruler and measure the inside edge to edge, in millimeters.
Circumference
Wrap a strip of paper around the base of your finger, mark where it overlaps and measure the length.
Timing
Measure at the end of the day when fingers are warm. They are smallest in the morning and in cold weather.
Free resizing
Every ring includes one free resize within 60 days, so you can order with confidence.

Between sizes? Size up for a relaxed fit. Free exchanges within 30 days.

Metal

Ring size

Clear

Order within 8h 45m delivered Tue, Oct 20 – Thu, Oct 22

SKU: N/A Categories: Rings, Bridal

Description

Our most-loved engagement ring. Lumen sets a brilliant round lab-grown diamond in a slim cathedral setting that sits low, so it slides under sweaters and gloves without catching.

Details

0.75 ct round brilliant lab-grown diamond, F color, VS1 clarity
14k recycled gold band, 1.8 mm
Four-prong cathedral setting
Includes an independent grading report

Care

Soak in warm water with a drop of mild dish soap and brush gently. Free cleaning and prong check for life at our Austin studio.

Every piece includes

Linen gift box and polishing cloth
Free insured US shipping over $100
Lifetime cleaning and inspection at our Austin studio

Made by hand in Austin, Texas, from 100% recycled metal.

Additional information

Metal	Yellow Gold, Rose Gold
Ring size	5, 6, 7, 8, 9

2 reviews for Lumen Lab Diamond Solitaire

Rated 5 out of 5

Kimberly Shaw (verified owner) – August 16, 2026

Sits so low that it never snags my knits. The grading report gave us real peace of mind.
Rated 5 out of 5

Nathan Ellis (verified owner) – September 12, 2026

Proposed in Zilker Park with this ring. The sparkle in daylight is unreal and she said yes.