• from pet ashes or hairs to diamond process, CVD to memorial diamond
  • Diagram showing the process of turning pet waste into diamonds with Japanese text.
  • Diagram of labelling and tracking process for diamond samples with icons and text.
  • Product packaging with labels and tracking information on a beige background
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MadisonDia

Custom Pet Memorial Diamond

Custom Pet Memorial Diamond

HK$10,500.00
HK$10,500.00
Sale Sold out
Shipping calculated at checkout.
Carat

Custom Pet Memorial Diamond — a one-of-a-kind diamond grown from the carbon of your beloved companion. Each MadisonDia Pet Memorial Diamond is custom created from the cremated ashes or fur of your pet, producing a genuine diamond that is chemically, physically, and optically identical to a mined diamond.

For Full MadisonDia Memorial Diamond Details

The process begins after you place your order. We send you a complimentary collection kit, which you return with a sample of your pet's ashes (minimum 300g) or fur (minimum 10g), or a combination of both. Our laboratory extracts and purifies the carbon, then uses CVD technology to recreate the natural conditions deep within the earth where diamonds form. Once grown, your diamond is cut and polished by master cutters, laser-inscribed with a unique reference ID, and delivered in a presentation case with a Certificate of Authenticity guaranteeing its weight, cut, color, and origin.

The complete process takes approximately 4 to 7 months from sample receipt to delivery. Independent certification from GIA, IGI, or EGL is available upon request for an additional fee.

We create memorial diamonds for all beloved companions including dogs, cats, horses, rabbits, and birds. This listing is for the loose diamond only — to have your memorial diamond set into a ring, pendant, or other jewelry piece, please contact us to discuss custom setting options.


For inquiries or to discuss your custom order, please contact info@madisondia.com.

We curated the collection so you can skip the search. Every diamond we offer is already the perfect choice.


Every diamond we sell is

D
Color Grade

The highest color grade — completely colorless, the rarest and most coveted. E Grade applied to Limited Sale Collection 
VVS
Clarity Grade

VVS1–VVS2: virtually flawless to the naked eye, only minute inclusions under 10× magnification
3EX
Ideal Cut

Excellent Cut, Polish & Symmetry — the highest grade for maximum brilliance and sparkle
IGI
Certified

Independently graded by the International Gemological Institute — certificate emailed before dispatch

We only sell this one premium standard — so you never have to compare lower grades, or second-guess your decision.


You just choose the size. That's it.

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Things you need to know before purchase

💎 MadisonDia Premium Lab-Grown Diamond Standards ▼

Only International Gemological Institute (IGI) certified diamonds — ID EX / EX grade, each meeting our proprietary MISI™ (MadisonDia Ideal Sparkle Index) score of 80+.

MISI™ goes beyond the traditional 4Cs by evaluating advanced light performance — brilliance, fire, and scintillation — ensuring exceptional real-world sparkle, not just laboratory grading.

  • ✉️ After purchase, we'll email the IGI certificate for your review.
  • 💎 Not loving the diamond? Just say so — we'll show you 5+ replacements of the same size.
  • 🔄 Still not satisfied? Get a full refund, no fees — guaranteed.
📦 Shipping & Return ▼

Free Shipping on all purchases

💎 Loose Diamonds

  • Processing: 1–2 business days
  • Shipping: 3–8 business days (insured courier)
  • 30-day unconditional refund

💍 Finished Jewelry

  • Production: 5–15 business days
  • Shipping: 3–8 business days after production
  • Diamond portion refunded in store credits
  • Jewelry: USD $40 polishing & restock fee
  • 14-day refund window

Shipping details → Return & refund policy →

🏛️ Why Buy from Madison Avenue HK | MadisonDia ▼

A trusted name since 2012 — Madison Avenue is a well-known physical luxury boutique in Hong Kong. With a long and reliable track record, you can also verify our 5-star rating on BUYMA.

🔧 Free Repair Service

  • • Complimentary repair within the first year. After one year, repair costs are quoted separately.
  • • For side stones (if any, excluding the main diamond), one complimentary repair within the first year. Afterward, costs are quoted separately.
  • • Due to variations in craftsmanship, certain items may not be eligible for complimentary service. Excludes damage caused by human factors.

Frequently Asked Questions

Why Choose MadisonDia for Your Diamond?

Madison Avenue | MadisonDia brings over a decade of experience in luxury and diamond jewelry sales across Hong Kong, Macau, Taiwan, and Japan. Unlike other merchants who rely on inflated reviews, our perfect 5.0 seller rating on BUYMA is verified and backed by genuine customer transactions. Every diamond is independently certified by IGI or GIA. Thanks to our direct pricing model, you can acquire premium diamonds at unbeatable prices. We also maintain extensive inventory of lab-grown diamonds for our clients to choose from. Whether in product quality, pricing, or credibility, MadisonDia consistently outperforms other vendors.

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What is a lab-grown diamond?

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.

Why are MadisonDia's diamonds more affordable?

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.

Is shopping on your website secure?

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