Frequently Asked Questions

Since 2012, Madison Avenue HK has been a trusted name in luxury retail. We began as a well-established physical boutique in Hong Kong, renowned for our reputation and reliability. Today, through MadisonDia, we bring that same credibility online. You can also verify our strong track record by checking our 5-star rating on BUYMA.

Just as Madison Avenue has always offered luxury without the unnecessary markup, MadisonDia eliminates the middlemen. By working directly with leading laboratories, we provide exceptional lab-grown diamonds at true factory-direct prices.

• D Color – completely colorless
• VVS1–VVS2 Clarity – near flawless
• Triple Excellent Cut – maximum brilliance

Every diamond is independently certified by IGI or GIA. Thanks to our direct-pricing model, you receive premium-grade diamonds at unmatched value.

Yes. Every diamond is accompanied by an IGI or GIA certificate verifying its quality and authenticity.

Lab-grown diamonds are real diamonds, created using advanced technology that replicates the natural formation process. They are identical in composition, brilliance, and durability to mined diamonds—without the environmental and ethical concerns.

👉 For more details, please visit our Full Explanation Page.

We regularly update our blog with in-depth guides, industry insights, pricing trends, and the latest diamond news. Whether you are comparing natural vs. lab-grown or tracking market updates, you’ll find exclusive and reliable knowledge.

Once you place an order, we’ll send you the IGI certificate of your selected diamond for review. If the specifications do not meet your expectations, our customer service team will provide at least 5 alternative options.

If you are still unsatisfied, you may request a full refund with no additional fees.

• Newsletter members receive an extra 10% coupon.
• Former Madison Avenue 14F customers can request a dedicated coupon via customer service.
• For influencer-affiliated codes, please contact the influencer directly.

• Visa
• MasterCard
• American Express
• PayPal
• Bank Transfer

Yes. Our site is fully protected with SSL encryption, and payments are securely processed via trusted gateways such as Stripe and PayPal. We never store your payment details.

• Loose Diamonds: Full refund within 30 days of delivery.
• Finished Jewelry: Refund within 14 days. A US$40 polishing fee applies. Items must be returned in original condition with certificates.

📦 Return shipping must be insured, trackable, and covered by the customer.

Hong Kong, Macau, Taiwan, United Kingdom (mainland), United States, Canada, and Australia.

If your country is not listed, you may be responsible for return costs. Please contact customer service for instructions.

• 💎 Loose Diamonds: 30 days – unconditional refund
• 💍 Finished Jewelry: 14 days – refund policy applies

Refunds are processed within 3 business weeks after receiving your return.

Last updated: August 17, 2025

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