Home / Rings / Diamond / Cosma Mystical Round Lab Grown Diamond Engagement Ring | 18K White Gold 4 CT. TW.
1.50ct Ceylon Blue Sapphire GIA • IGI Certified
Cosma Mystical Round Lab Grown Diamond Engagement Ring | 18K White Gold 4 CT. TW. High Definition View
White Gold / Sterling Silver View
Sold by: La Joya Jewelry

Cosma Mystical Round Lab Grown Diamond Engagement Ring | 18K White Gold 4 CT. TW.

$4,499.99 $5,174.99 Save $675.00
Select Metal & Gold Purity: 92.5 Sterling Silver
92.5 Silver
$4,499.99
10K YG
$6,725.24
10K WG
$6,725.24
14K YG
$7,702.63
14K WG
$7,702.63
18K YG
$9,168.28
18K WG
$9,168.28
Select Finger Size: Find My Ring Size
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18K white gold whispers romance in this exclusive vintage ring. A sparkling 3 1/2 carat round lab-grown diamond takes center stage, embraced by mystical hues. Delicate diamond accents dance on the shoulders and frame the center stone. This ring celebrates the artistic and audacious woman, a unique symbol of your love story.

Product Name Cosma Mystical Round Lab Grown Diamond Engagement Ring | 18K White Gold 4 CT. TW.
Item Code / SKU SKU-519385
Category Rings
Subcategory Diamond
Availability In Stock • Available Online

Frequently Asked Questions: Cosma Mystical Round Lab Grown Diamond Engagement Ring | 18K White Gold 4 CT. TW.

Find details regarding authenticity, materials, sizing, and care tailored to this piece.

Are the lab-grown diamonds in this Cosma Mystical Round Lab Grown Diamond Engagement Ring | 18K White Gold 4 CT. TW. certified and authentic?
Yes. Lab-grown diamonds are 100% genuine diamonds with identical carbon crystal lattice, fire, and durability as earth-mined diamonds. Every piece is certified for authenticity, color, and clarity.
What precious metal options and customizations are available?
This piece is crafted in Solid Gold & Sterling Silver. We also offer bespoke crafting in 10K, 14K, 18K Solid Yellow Gold, White Gold, Rose Gold, or Platinum upon request. Every piece carries official hallmark stamps guaranteeing genuine metal purity.
Can this ring be ordered in my exact finger size, and is resizing available?
Yes. We offer standard US ring sizes from 4.5 through 10, as well as custom half and quarter sizes. We also provide complimentary 60-day ring resizing so your ring fits comfortably and securely.
How should I clean and maintain this Cosma Mystical Round Lab Grown Diamond Engagement Ring | 18K White Gold 4 CT. TW. to keep its brilliance?
Clean gently at home using warm water, mild soap, and a soft-bristled brush, then pat dry with a lint-free cloth. Avoid exposure to chlorine, bleach, household cleaners, and perfumes. Store your jewelry in the complimentary luxury presentation box when not being worn.
What shipping, warranty, and return guarantees are included?
Your order includes complimentary 100% fully insured express courier shipping with signature confirmation, discrete luxury gift packaging, a 30-day money-back satisfaction guarantee, and a lifetime warranty on metal casting and stone setting craftsmanship.
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