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Support

Contact Us

Last updated: 18 August 2026

Customer care

We are a small team and we answer every message ourselves. Whatever the question — a stone, a size, a delivery, a return — write to us and a person will reply.

Email  ·  support@lumera-diamonds.com
We reply within 2 business days, Monday to Friday.
Please include your order number if you have one — it is in your confirmation email and starts with LM.

What to write to us about

Your question is aboutPlease includeTypical reply
An order you have placedOrder number, and the tracking number if it has shipped1 business day
Sizing, or a resize requestOrder number and your correct ring size (US or HK)1 business day
A return or exchangeOrder number and which items you are returning1 business day
A stone, certificate or specificationThe product name or SKU code2 business days
A privacy or data requestSubject line "Privacy Request", and the email address on your orderWithin 30 days
Wholesale or partnershipYour company and market3 business days

Before you write

These four pages answer most questions faster than we can:

Business details

Mooning Limited
Incorporated in the Hong Kong Special Administrative Region
Trading as LUMÉRA at www.lumera-diamonds.com
Email: support@lumera-diamonds.com

We trade online only and do not operate a walk-in showroom. All enquiries are handled by email so that there is a written record for both of us.

What we will never ask you for

We will never ask you by email for your full card number, your card security code, your password, or a payment to an account outside our checkout. If you receive a message claiming to be from us that asks for any of these, it is not from us — please forward it to support@lumera-diamonds.com and delete it.