Terms of service
TERMS OF SERVICE
Last updated: September 14, 2026
OVERVIEW
NYON DIAMOND is operated by MESAC INC, a corporation incorporated in the State of Delaware, United States.
Throughout these Terms, "NYON DIAMOND" refers to our brand and store, and "we," "us," and "our" refer to MESAC INC. We operate this website and provide the information, content, features, tools, products, and services available through it (collectively, the "Services"). Our online store is hosted by Shopify.
These Terms of Service (the "Terms"), together with the policies referenced below and any applicable order-specific terms agreed to in writing, govern your access to the Services and purchases from us.
Please read these Terms before using the Services or placing an order. By using the Services or placing an order, you agree to these Terms to the extent permitted by applicable law. If you do not agree, please do not use the Services or place an order.
Information about how personal information is handled is available in our Privacy Policy:
https://www.nyondiamond.com/policies/privacy-policy
SECTION 1 — BUSINESS CUSTOMERS, AUTHORITY, AND ACCOUNTS
Our store is intended for professional piercing studios, jewelry retailers, distributors, and other approved business customers purchasing for professional, commercial, or resale purposes.
You must be at least the age of majority in your place of residence and have the legal capacity to enter into a binding agreement. If you act on behalf of a business or organization, you represent that you have authority to bind it, and references to "you" include that business or organization.
You must provide current, complete, and accurate account, billing, payment, shipping, and business information and update it when necessary.
You are responsible for protecting your account credentials and notifying us promptly of suspected unauthorized access. You may not sell, transfer, or share access to your account with an unauthorized person.
SECTION 2 — WHOLESALE APPROVAL AND RESALE
An approved wholesale account is required to place orders through our store. Submitting an application does not guarantee approval.
We may request information reasonably necessary to verify your business and review an application or order. We may approve, decline, suspend, or revoke wholesale access for legitimate business, compliance, or security reasons, subject to applicable law and existing contractual obligations.
Approved customers may purchase genuine NYON DIAMOND products for lawful commercial resale. Purchasing products does not create an exclusive distributorship, agency, franchise, employment relationship, or authority to act on behalf of MESAC INC.
Resale of physical products does not transfer ownership of our trademarks, product photographs, designs, or other intellectual property. Use of those materials requires separate permission unless applicable law permits the use.
You must not falsely represent that you are MESAC INC, NYON DIAMOND, or our exclusive or authorized representative.
SECTION 3 — PRODUCTS AND PRODUCT INFORMATION
We make reasonable efforts to describe products accurately. Please review the material, gemstone type, dimensions, quantity, and other specifications shown for the particular item before ordering.
Photographs and display settings may affect the appearance of colors and scale. Images are not a substitute for the written specifications and do not excuse a material difference between delivered goods and the agreed description.
We may update product information, prices, and availability for future orders. Such changes do not automatically alter specifications or prices already agreed to for an accepted order.
You are responsible for selecting products appropriate for your intended professional or commercial use and for complying with requirements applicable to your own business.
Product and educational information is general information, not medical advice or a substitute for an individualized professional assessment. Nothing in this section limits our responsibility for inaccurate descriptions or non-conforming goods under applicable law.
SECTION 4 — ORDERS, ACCEPTANCE, AND CANCELLATIONS
Submitting an order is a request to purchase. An automatically generated order receipt or payment acknowledgement does not, by itself, confirm that all availability, payment, and verification checks have been completed.
We may contact you to verify payment, product availability, wholesale account status, shipping details, or other information reasonably necessary to process an order.
If we decline or cancel an order before fulfillment, we will notify you and refund payments collected for the canceled, unfulfilled portion, including associated charges where applicable. We will not substitute materially different products or increase the agreed price without your consent.
Please review your order before submitting it. Contact support@nyondiamond.com promptly to request a change or cancellation. We cannot guarantee that an order can be changed or canceled once processing, production, or shipment has begun, subject to agreed order terms and applicable law.
Any special cancellation restrictions or charges for custom orders must be disclosed and agreed to before the order is placed. Nothing in this section restricts a cancellation or refund right that cannot lawfully be excluded.
SECTION 5 — PRICES, PAYMENT, TAXES, AND CHARGES
Unless another currency is expressly shown, prices are stated in U.S. dollars. The applicable price and currency are those presented at checkout or in the written order terms accepted before purchase.
Prices, discounts, and promotions may change for future orders. Changes do not retroactively increase the price of an accepted order without your agreement.
For business-to-business purchases, product prices exclude shipping, taxes, import duties, brokerage fees, and other charges unless stated otherwise. Charges collected by us will be disclosed at checkout or in the agreed written order terms before payment.
Responsibility for import duties, taxes, and charges collected by a carrier or customs authority will be explained in the Shipping Policy or order-specific shipping terms. Applicable law takes priority over any inconsistent allocation of charges.
You agree to use an authorized payment method and pay the amounts agreed to for your order. We may use third-party providers to process payments.
Any separate promotion terms must be made available before purchase and apply only to the relevant promotion.
SECTION 6 — SHIPPING AND DELIVERY
Shipping arrangements are described in our Shipping Policy:
https://www.nyondiamond.com/policies/shipping-policy
Orders may be fulfilled from Qingdao, China, or from available inventory at our New York showroom, according to product availability and the shipping arrangements applicable to the order. Not all products are stocked in or shipped from the United States.
Our New York location fulfills U.S. domestic orders from local stock. Orders for destinations outside the United States are fulfilled from Qingdao under our current fulfillment arrangements.
Applicable processing times, estimated transit times, shipping charges, and material cross-border shipping conditions will be communicated before purchase through the Shipping Policy, checkout, or written order terms.
Delivery estimates are not guarantees unless expressly agreed otherwise in writing. If we become aware of a material delay, we will inform you and explain the available options, including cancellation or refund where required by law.
Carrier or customs delays do not remove rights or remedies that cannot lawfully be excluded.
SECTION 7 — RETURNS, REFUNDS, AND EXCHANGES
Return eligibility, request periods, hygiene restrictions, custom-order exclusions, return shipping, and refund procedures are described in our Return & Refund Policy:
https://www.nyondiamond.com/policies/refund-policy
Please review that policy before ordering. Return destinations vary by order; our business address and New York showroom are not automatic return destinations.
Any different return or cancellation terms for a particular wholesale or custom order must be disclosed and agreed to in writing before purchase. Nothing in these Terms limits remedies for defective, damaged, incorrect, or otherwise non-conforming goods that cannot be excluded by law.
SECTION 8 — CUSTOM ORDERS AND ORDER-SPECIFIC TERMS
Custom and other individually negotiated orders may be governed by written quotations, specifications, approvals, and order terms agreed to by both parties before purchase.
Relevant details may include materials, gemstone selection, dimensions, quantities, production timing, payment arrangements, and cancellation or return conditions. Only details expressly agreed to apply to the order.
Where a valid order-specific term conflicts with these Terms, that term controls for the relevant order to the extent permitted by law.
An invoice or other document issued after purchase does not, by itself, introduce new restrictions or charges. Material changes require agreement, unless applicable law provides otherwise.
SECTION 9 — INTELLECTUAL PROPERTY
The website and its content, including trademarks, logos, text, photographs, graphics, videos, and designs, are owned by MESAC INC or the relevant rights holders and are protected by applicable intellectual property laws.
You may use the Services for lawful browsing, wholesale account administration, purchasing, and internal business evaluation. You may retain copies of your own transaction records and applicable policies.
Except as permitted by applicable law or written authorization, you may not reproduce, distribute, modify, republish, sell, or commercially exploit protected website content.
Purchasing or reselling genuine products does not grant additional intellectual property rights beyond those provided by applicable law or a separate agreement.
SECTION 10 — THIRD-PARTY TOOLS AND LINKS
The Services may contain tools, applications, payment services, or links provided by third parties. Those services may be subject to separate terms and privacy practices.
We do not control all third-party services and cannot guarantee their uninterrupted availability. Please review the relevant provider's terms before using a separate third-party service.
This section does not exclude responsibility for our own obligations or any responsibility that cannot be excluded under applicable law.
SECTION 11 — RELATIONSHIP WITH SHOPIFY
Shopify provides the technology used to host our online store. Purchases made through the store are transactions directly between you and MESAC INC, the company operating NYON DIAMOND.
Shopify is not the seller of our products and is not a party to the sales contract between you and MESAC INC.
Nothing in this section excludes responsibility or liability that cannot lawfully be excluded.
SECTION 12 — PRIVACY
Our handling of personal information is described in our Privacy Policy:
https://www.nyondiamond.com/policies/privacy-policy
Shopify and other service providers may process information as described in that policy and their applicable notices.
Using the Services does not waive your data protection rights or constitute consent to processing for which separate consent is required by law.
SECTION 13 — FEEDBACK AND CUSTOMER CONTENT
If you submit reviews, suggestions, photographs, or other content, you represent that you have the right to submit it and that it does not unlawfully infringe another person's rights.
For content submitted for public display, such as a product review, you grant us a non-exclusive, royalty-free license to display and reproduce it in connection with the Services, subject to applicable law and any permissions required for its use.
Private correspondence, confidential business information, and custom-order specifications are not treated as permission to publish them for marketing. Any separate use requires appropriate authorization.
We may remove content that is unlawful, infringing, misleading, abusive, or otherwise inconsistent with these Terms.
SECTION 14 — ERRORS AND AVAILABILITY
We may correct errors or omissions in product descriptions, prices, availability, or other information.
If a material error affects an existing order, we will contact you to explain the issue and available options. We will not impose a materially different product or increased price without your agreement.
If we cancel the affected order, payments for the canceled, unfulfilled portion will be refunded as described in Section 4 and required by applicable law.
SECTION 15 — PROHIBITED USES
You must not use the Services to commit fraud, impersonate another person, infringe rights, transmit harmful code, collect personal information unlawfully, send spam, or interfere with website security or operation.
You must not bypass account approval or access restrictions, use another customer's credentials without permission, or make misleading statements about your relationship with us.
Automated access that bypasses restrictions, compromises security, or copies protected content without authorization is prohibited, except where applicable law permits it.
SECTION 16 — SUSPENSION AND TERMINATION
We may suspend or terminate access where reasonably necessary to address a material breach, fraud, security risk, legal requirement, or other lawful reason.
Suspension or termination does not cancel an obligation to provide goods, refunds, or other remedies already owed under an accepted order or applicable law. You remain responsible for amounts lawfully due.
Provisions intended to continue after termination, including applicable payment obligations, intellectual property rights, and dispute-related provisions, will continue to apply.
SECTION 17 — WEBSITE WARRANTIES AND PRODUCT RIGHTS
Except as expressly stated, we do not guarantee that the website will be continuously available, error-free, or compatible with every device or service.
To the extent permitted by law, the website and optional online tools are provided on an "as is" and "as available" basis.
These website disclaimers do not override agreed product descriptions, express product warranties, our Return & Refund Policy, or rights relating to goods that cannot lawfully be excluded.
SECTION 18 — LIMITATION OF LIABILITY
To the extent permitted by law, MESAC INC will not be liable for indirect, incidental, special, punitive, or consequential losses, including lost profits or business opportunities, arising from the Services or products.
This limitation does not exclude liability for fraud, willful misconduct, gross negligence, or any other liability that cannot lawfully be excluded or limited.
It does not remove an obligation to provide an agreed or legally required refund, replacement, repair, or other remedy.
SECTION 19 — INDEMNIFICATION
To the extent permitted by law, you agree to indemnify MESAC INC against third-party claims and reasonable related costs arising from your material breach of these Terms, unlawful use of the Services, or infringement of third-party rights.
This obligation applies only to the extent the claim is caused by your conduct. It does not apply to the extent a claim results from our own breach, negligence, or unlawful conduct, or where such an obligation is prohibited by law.
SECTION 20 — SEVERABILITY
If a provision is found invalid or unenforceable, it will be limited or removed to the extent necessary. The remaining provisions will continue to apply to the extent permitted by law.
SECTION 21 — WAIVER AND ENTIRE AGREEMENT
A failure to enforce a provision on one occasion does not waive the right to enforce it later.
These Terms, the policies incorporated by reference, and applicable written terms agreed to for an order form the agreement concerning the Services and that order.
This section does not exclude liability for fraud or rights that cannot lawfully be excluded.
SECTION 22 — ASSIGNMENT
You may not transfer your account or contractual obligations without our prior written consent, except where applicable law permits otherwise.
We may transfer these Terms as part of a lawful merger, reorganization, or business transfer, subject to applicable law and without reducing rights already arising from accepted orders.
SECTION 23 — APPLICABLE LAW AND MANDATORY RIGHTS
MESAC INC is incorporated in Delaware, United States. These Terms and transactions are subject to applicable U.S. federal and state law, as determined under the relevant choice-of-law rules.
Nothing in these Terms removes protections or jurisdictional rights that cannot be waived under applicable law.
Our store is intended for business-to-business transactions. However, describing an order as wholesale does not exclude consumer protections if applicable law treats the buyer as a consumer.
SECTION 24 — CHANGES TO THESE TERMS
We may update these Terms by publishing a revised version and updating the date above. We will provide additional notice of material changes where required by law.
Revisions apply prospectively and do not, by themselves, reduce rights or change prices, specifications, or obligations already agreed to for an accepted order.
Any changes to an existing order require agreement or another valid legal basis.
SECTION 25 — CONTACT INFORMATION
NYON DIAMOND is operated by MESAC INC.
For questions about these Terms, your account, or an order, please contact us:
Email: support@nyondiamond.com
Business phone: +1 986-285-3757
Business address:
1226 North King St Num 1186, Wilmington, DE 19801, USA
New York showroom:
269-271 Canal St. 2F, New York, NY 10013, USA
These addresses are business contact locations and are not automatic return destinations. Please follow the designated return address and instructions applicable to your order.