Lab Grown Diamonds · IGI Certified · Wholesale B2B Only

Support & Information

How Can We Help?

Contact us, track your order, or find answers to common questions about shipping, sizing, and care.

Get in Touch

Send us a message and we'll get back to you within 1 business day.

Shipping & Returns

Insured Shipping

Every order ships fully insured via a signature-required carrier. Your investment is protected from our door to yours. If your package is lost or damaged in transit, we work to resolve it immediately.

Shipping Timeframes

MethodEstimated Delivery
Standard5–7 business days
Expedited2–3 business days
OvernightNext business day
Custom Orders2–4 weeks production + shipping

International Shipping

We ship internationally. Delivery times and rates vary by destination. Import duties and taxes are the responsibility of the recipient and are not included in the order total.

Returns Policy

All sales are reviewed on a case-by-case basis. Please contact us at Sales@sanomajewelry.com within 7 days of receiving your order if there is an issue. Custom and special-order pieces are non-returnable.

Ring Sizing

Use the chart below to find your ring size. For the most accurate measurement, visit a local jeweler for a professional sizing.

US to International Size Chart

US SizeDiameter (mm)Circumference (mm)UK SizeEU Size
414.946.8H47
515.749.3J ½49
616.551.8M52
717.354.4O54
818.156.9Q57
918.959.5S60
1019.862.1T ½62
1120.664.6W65
1221.467.2Y67

Tips for Accurate Sizing

  • Measure your finger at the end of the day when fingers are slightly larger
  • Measure when your hands are warm — cold hands can be up to half a size smaller
  • For wider bands (over 6mm), consider sizing up by half a size
  • When between sizes, choose the larger size

Need Help?

Not sure of your size? Contact us at Sales@sanomajewelry.com and our team can guide you through the sizing process before your order.

Jewelry Care Guide

Daily Care

  • Remove jewelry before showering, swimming, or exercising
  • Avoid contact with lotions, perfumes, and cleaning chemicals
  • Put jewelry on last when getting dressed
  • Remove rings when working with your hands

Cleaning Your Jewelry

  • Clean with warm water, a few drops of mild dish soap, and a soft toothbrush
  • Gently scrub around the stone and setting
  • Rinse thoroughly and pat dry with a lint-free cloth
  • Avoid ultrasonic cleaners on pieces with prong settings without professional advice

Storage

  • Store each piece separately in a soft pouch or lined jewelry box
  • Keep away from direct sunlight and extreme temperatures
  • Diamonds can scratch other gemstones — store them apart

Lab Grown Diamond Care

Lab grown diamonds have the same physical and chemical properties as mined diamonds and require the same care. They are the hardest natural material (10 on the Mohs scale) but can still chip if struck at the right angle. Handle with care and have settings checked periodically by a professional jeweler.

Frequently Asked Questions

What is a lab grown diamond?
Lab grown diamonds are real diamonds created in a controlled laboratory environment using the same carbon crystallization process as natural diamonds. They are chemically, physically, and optically identical to mined diamonds — the only difference is origin.
Are your diamonds IGI certified?
All loose stones in our collection are independently certified by IGI (International Gemological Institute). Select finished jewelry pieces are also IGI certified — this is noted in the individual product description. Each certificate confirms the stone's cut, color, clarity, and carat weight.
How do I apply for a wholesale account?
Submit your application through our wholesale application page. Our team reviews all applications within 1–2 business days and will contact you once approved.
What is your minimum order quantity?
There is no minimum order quantity. You can order a single piece or an entire collection.
How long does a custom order take?
Custom orders typically take 2–4 weeks from order confirmation to completion. Rush orders may be available — contact us to discuss your timeline.
Do you offer private label or white label programs?
We offer both. Contact us or submit a custom order request to discuss your specific program needs.
What metals do you work with?
We work with 10K, 14K, and 18K yellow gold, white gold, and rose gold, as well as platinum. Two-tone options are available on select styles.
How is shipping handled?
All orders ship fully insured via a signature-required carrier. Shipping times vary by method — standard 5–7 business days, expedited 2–3, overnight next day.
What happens if my order arrives damaged?
Contact us within 48 hours of delivery with photos of the damage. We will work to resolve the issue immediately. All orders are fully insured in transit.
How do I check the status of my order?
Log in to your account at sanomajewelry.com and view your order history. You can also contact us at Sales@sanomajewelry.com with your order number.