Lumière Rhombus 3.5CT Moissanite Engagement Ring Gold

Lumière Rhombus sets a bold rhombus-cut moissanite on a clean 925 sterling silver band. The geometric cut reflects light in sharp, striking angles for exceptional fire — a distinctive alternative to round or oval stones.

D-color VVS moissanite gives diamond-like clarity, and each ring comes with a GRA certificate. Available in a gold or silver finish; a modern engagement ring or statement piece.

SPECIFICATIONS

Center Stone: Rhombus-cut Moissanite, 3.5 ct, D color, VVS clarity, GRA Certified
Metal: 925 Sterling Silver, gold or silver finish
Band Width: approx. 8 mm
Sizes: US 5–9

DELIVERY & RETURNS

Dispatched within 1–3 business days and delivered in 3–7 business days, fully insured with tracking. Returns accepted within 30 days of delivery.

Delivery & Returns · Ring Size Guide · Jewelry Care Guide

How to Care for Your Jewelry

With the right care, your Oxfordum pieces will last for years. Follow these simple guidelines to keep your jewelry looking its best.

Gold Vermeil & Gold-Filled

• Remove before swimming, showering, or exercising.
• Avoid perfume, lotions, and harsh chemicals directly on the piece.
• Store in a cool, dry place — ideally in a pouch or jewelry box.
• Clean with a soft dry cloth after wearing.

Sterling Silver

• Silver naturally tarnishes over time — this is normal.
• Polish with a silver cloth to restore shine.
• Store in an airtight bag or box to slow tarnishing.
• Avoid exposure to chlorine, saltwater, and sulfur.

Stainless Steel (Watches & Accessories)

• Wipe with a damp cloth to remove sweat and oils.
• Safe for daily wear — highly resistant to tarnish and scratching.
• Avoid abrasive cleaners.

Waterproof & Tarnish Resistance

Many of our pieces feature PVD coating or rhodium plating for enhanced durability. Check individual product pages for specific care instructions. As a general rule: remove jewelry before swimming in chlorinated pools or saltwater.

General Tips

• Put jewelry on last — after makeup, hairspray, and perfume.
• Remove before sleeping to prevent bending or breakage.
• Store pieces separately to avoid scratching.

Questions about a specific piece? Contact us — we're happy to help.

Delivery

We currently ship within the United States. Orders are prepared and dispatched within 1–3 business days, and delivery typically takes 3–7 business days after dispatch. Once dispatched, you'll receive a confirmation email with your tracking number.

Because we work with specialist suppliers, some orders may arrive in separate packages, each with its own tracking number. Every order ships fully insured.

Track your order →

Returns

We accept returns within 30 days of delivery — including sale items — for pieces in their original, unworn condition and original packaging. Items marked Final Sale on the product page and personalized pieces can't be returned unless they arrive defective or damaged.

To start a return, contact us and we'll send you the return address and instructions. Return shipping is the customer's responsibility, and original shipping charges are non-refundable, unless the item arrived defective, damaged or incorrect. If something is wrong with your order, please let us know within 48 hours of delivery.

Read our full Return & Refund Policy and Shipping Policy.