MadisonDia Comparison | Lab-Grown Diamond Prices & Reliability
Since its founding in 2012, Madison Avenue HK (MadisonDia) has been committed to providing high-quality lab-grown diamonds across Hong Kong and Asia.
The table below clearly shows the differences between us, major chain stores, and other online stores, so you can quickly understand the key points when choosing a diamond.
Whether it’s price, authenticity, or service quality, we are dedicated to providing the most transparent and reliable buying experience.
| Category | Madison Avenue HK | MadisonDia | Chain Stores / Retailers | Other Online Stores |
|---|---|---|---|
| Authenticity Guarantee |
✅ Yes Since 2012 |
Yes | ❌ Inconsistent |
| Price (Loose Diamonds) | 10–20% lower than market price | Often 50%+ above buyback value | Low, but quality varies |
| Staff Quality | 10+ years luxury retail experience Focus on customer education |
Varies | Self-proclaimed “experts,” often exaggerated |
| Price Transparency | ✅ Fully listed online | Limited 4C info | ✅ Listed |
| Hard-Selling Practices | ❌ None | Frequent | Inconsistent |
| Sales Tactics | No exaggeration, no investment hype | Varies | Often exaggerated, resale/investment claims |
| After-Sales Service | Free cleaning & inspection | Free cleaning & inspection | Free cleaning & inspection |
| Reputation | ⭐ Real 5-star BuyMa reviews Wholesale leader, fast diamond turnover |
Good | Unreliable reviews |
| Overseas Market | Distributors in Japan, Thailand & Asia | Some | None |
| Extra Fees & Rebates | No hidden charges | Common fees/rebates | No hidden charges |
| Custom Design Services | ✅ Supported | ❌ Generally not supported | ✅ Supported |
MadisonDia prioritizes transparency in price, quality, and service, helping customers confidently purchase lifelong lab-grown diamonds while enjoying a premium jewelry experience.