Preferred for orders, sample instructions, returns, payments and documentation.
Contact Us
Black Jack® Customer Support
Contact Us.
Get help with Memory Diamonds, laboratory-grown diamond jewelry, custom orders, worldwide shipping, tracking, payments, returns, certification and account questions.
For order-related help, email or the form below is the preferred method because it creates a written record that helps Black Jack verify and resolve the request securely.
Worldwide Customer Support
Mon–Sat · 9:30 AM–6:30 PM ET
Response Target: 24–48 Hours
Fastest Support Route
Include the right reference
01
Order HelpInclude your Order ID and checkout email.
02
Memory DiamondInclude Carbon Sample ID if already assigned.
03
ShippingInclude your carrier tracking number.
04
Certificate HelpInclude Certificate ID or Carbon Sample ID.
For customer support during published support hours.
9:30 AM–6:30 PM Eastern Time. International customers may email at any time.
Complex custom, laboratory, return or payment cases may require additional verification.
Choose the Right Help Department
Tell us what you need help with.
Using the correct inquiry type helps the team identify the records required to resolve your request.
01
Orders
General Order Support
Order confirmation, product details, sizing, order changes and general purchase questions.
Contact Order Support →02
Memory
Memory Diamond Support
Hair/ashes instructions, Carbon Sample ID, production updates, stone specifications and memorial documentation.
Memory Diamond Help →03
Shipping
Worldwide Shipping & Tracking
International delivery, carrier tracking, customs-related delivery issues and delayed or missing shipments.
Track Shipment →04
Returns
Returns, Refunds & Exchanges
Return authorization, damaged/incorrect item claims, exchange requests and refund status.
Return Policy →05
Payments
Payment & Bank Wire
Card checkout, multi-currency payments, PayPal, Shop Pay, installments and bank-wire verification.
Payment Options →06
Certificate
Certificate Verification
Black Jack certificate records, Certificate ID, Carbon Sample ID and verification support.
Verify Certificate →07
Custom
Custom Jewelry & Design
Custom ring, pendant, earring, gemstone, metal, engraving and made-to-order design inquiries.
Custom Jewelry Guide →08
Privacy / Legal
Privacy, Data & Legal Questions
Privacy requests, data questions, Terms of Service, cookies and policy clarification.
Privacy Policy →Memory Diamond Support
Do not send hair, ashes or another personal sample before receiving routing instructions.
Memory Diamond orders can require order-specific packing, labeling and routing. International rules for sending hair, cremation ashes or another personal source can also vary by origin country, carrier and customs requirements.
Email is used for order confirmations and sample instructions because it provides the written traceability needed for personal-material handling.
Send a Message
Give us enough information to resolve your request faster.
Fields such as Order ID, tracking number or Carbon Sample ID are optional, but adding the relevant reference can reduce back-and-forth.
Security notice:
Black Jack does not ask for passwords, PINs or full payment-card details by email, chat
or social media. If you receive unexpected bank-wire instructions or a request for sensitive
payment credentials, verify the request using the official phone number or email shown on
brandblackjack.us before taking action.
Help Center & Policies
Many questions can be answered immediately.
FAQ / Help Center→
How Memory Diamonds Are Made→
Carbon Source Information→
Sample Packing & Security→
Worldwide Order Tracking→
Worldwide Shipping & Processing→
Returns, Refunds & Cancellations→
Payments & Multi-Currency Checkout→
Certification & Authenticity→
Verify a Certificate→
Privacy Policy→
Terms of Service→
Black Jack® Customer Care
One support team. Worldwide customers.
Send your question with the right Order ID, tracking number, Carbon Sample ID or Certificate ID and the team can route it faster.