1.5ct Lab Grown Diamond Engagement Ring
1.5 ct lab-grown diamond engagement rings in 18K solid gold, every centre stone GIA-certified. 1.5 ct is one of the most considered carat weights. Large enough to feel substantial on the finger, without crossing into statement-piece territory.
18K 1.51ct Pear & Round Cut Lab Grown Diamond Engagement Ring
18K 1.7ct Round Cut Lab Grown Diamond Three Stone Engagement Ring
18K 1.55ct Lab Grown Diamond Toi et Moi: Radiant & Pear Duo Harmony
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A 1.5 carat lab-grown diamond engagement ring costs $1,525 to $1,560 as an 18K gold solitaire. This page has rings from 1.3 to 1.81 carats, priced $1,455 to $2,750. Every ring is made in 18K solid gold.
Rings with side stones or a halo cost less at the same total weight, because the carats are split across several diamonds. See 1.5 carat diamond ring prices by shape for the full comparison.
How big 1.5 carats looks
A 1.5 carat round diamond measures about 7.4mm across. A 1 carat round measures about 6.5mm. A 1.5 carat oval measures about 8.5 × 6.3mm and looks larger than a round of the same weight. See 1.5 carat oval engagement rings.
Setting styles
A solitaire puts all the attention on the center stone. A halo adds a frame of small diamonds that makes the center stone look larger. A three-stone ring adds a smaller diamond on each side.
Certification
Lab-grown center diamonds come with an IGI grading report. The report ships with your ring. See sample reports.
With every ring
- Free insured shipping
- 30-day returns on unworn, unaltered pieces
- Lifetime warranty against manufacturing defects
- Complimentary cleaning and resizing
Compare 1.5 carat natural diamond engagement rings. Want a different design? Design your own ring. You approve a CAD render before your ring is made.
Frequently Asked Questions
How big does a 1.5 ct diamond look?
7.4mm round. On an average size 6 finger, 1.5 ct reads as substantial without being overwhelming. On larger fingers (size 7.5+), consider going slightly larger or adding a halo.
How much does a 1.5 ct lab-grown diamond engagement ring cost?
Pricing depends on cut, colour and clarity. Riyanika 1.5 ct lab-grown diamond engagement rings are listed at every price tier on this page. Lab-grown diamonds give you the same brilliance as a mined diamond at roughly 40–60% of the price, which means you can comfortably size up the centre stone.
Should I choose 1.5 ct lab-grown diamond or a different size?
If you are choosing lab-grown, the carat-per-dollar curve favours going up. A 2 ct lab-grown often costs the same as a 1 ct natural. Pick the carat that fits the finger and the budget, not a carat that compromises on cut quality.
Will a 1.5 ct ring need a halo to look bigger?
Not necessarily. A 1.5 ct centre stone in a clean solitaire reads confidently on most fingers. A halo is for buyers who want the visual effect of a larger centre without paying for one.
Are 1.5 ct lab-grown diamond diamonds GIA-certified?
Every centre stone above 0.30 ct is GIA-certified and laser-inscribed with its grading report number.
Can a 1.5 ct engagement ring be customised?
Yes. Choose your shape, setting, metal colour and prong style. Every Riyanika engagement ring can be made bespoke at no extra cost. We CAD-render every bespoke piece before we make it.