Frequently Asked Questions

The STDIAM Standard™ is our approach to gemstone selection, craftsmanship, finishing, and quality inspection.

We focus on carefully selected lab-grown gemstones, considered proportions, secure settings, and detailed inspection before each piece is dispatched.

Exact gemstone, metal, plating, setting, and sizing specifications vary by design and are listed on each individual product page.

Many STDIAM pieces are crafted after an order is placed so that the selected ring size, metal finish, gemstone size, and other standard options can be prepared for your order.

Selecting from the standard options normally offered on a STDIAM product page does not by itself make the item personalized or custom-made.

Available gemstone sizes vary by design. Many STDIAM rings are available in several carat-equivalent sizes, while other designs are offered only in selected proportions that best suit the setting.

Please refer to the size options and specifications shown on the individual product page for exact availability.

In some cases, we may be able to assist with non-standard sizing, gemstone combinations, setting changes, or other design requests. Please contact Customer Care before ordering so that we can confirm whether the requested change is technically possible.

Jewelry produced to individual specifications outside the standard options normally offered on our website may be treated as a custom order and may be final sale.

No. Moissanite and diamond are different gemstones with different chemical compositions and optical properties.

Moissanite is valued for its durability, clarity, and distinctive brilliance. STDIAM uses lab-grown moissanite so customers can choose it for its own appearance and performance rather than presenting it as a diamond.

Moissanite should not permanently become cloudy simply through normal wear. Oils, lotions, soap, cosmetics, and everyday residue can temporarily reduce the apparent brilliance of the stone.

Proper cleaning will normally restore its appearance. Eligible STDIAM moissanite is also supported by our Lifetime Stone Guarantee against verified permanent clouding, discoloration, or inherent loss of brilliance caused by a material defect.

Most of our core jewelry is crafted in 925 Sterling Silver.

Where specified, gold-tone pieces feature our 8-Layer 18K Gold Plating · 2.5μm Thickness, providing a more substantial plated finish for everyday jewelry.

Metal, gemstone, finish, and plating specifications may vary between collections, so the specifications shown on the individual product page should always be used as the reference for the piece you are purchasing.

Yes. Gold plating naturally changes with wear and may gradually fade depending on frequency of use, skin chemistry, friction, moisture, perfume, cosmetics, chlorine, and other chemicals.

To help extend the life of the finish, remove jewelry before swimming, showering, strenuous exercise, or using household chemicals, and store it clean and dry when not in use.

For more information, visit our Jewelry Care Guide.

Eligible moissanite center stones may include a gemstone report or certificate where stated on the applicable product page.

Certification availability may vary depending on gemstone size and design. Please refer to the individual product specifications for the most accurate information.

For the most accurate fit, we recommend measuring an existing ring that fits the intended finger or measuring the finger carefully before ordering.

Finger size may change slightly during the day because of temperature and activity, so measuring more than once can improve accuracy.

Eligible non-personalized rings may be returned or exchanged within our standard 30-day return period, subject to the conditions of our Return & Refund Policy.

Where the return or exchange is due to an incorrectly selected standard size, customers are responsible for return shipping costs unless otherwise required by applicable law.

Please review our Return & Refund Policy for full details.

Complimentary laser engraving is available on the inner band of eligible ring designs. Available engraving options and character limits are shown on the applicable product page.

In many cases, yes. Engraved rings may still be eligible for resizing by STDIAM where the ring design, setting, material, and requested size adjustment allow it.

Please contact Customer Care before returning the ring so that we can confirm whether resizing is possible.

Resizing an engraved or personalized item does not change its final-sale status.

Yes. STDIAM offers international delivery to supported destinations. Available shipping services may vary by destination.

Most STDIAM orders involve a crafting stage followed by the selected delivery service.

Shipping times are estimates and may be affected by destination, customs processing, holidays, severe weather, or carrier delays.

Once your order has been dispatched, tracking information will be sent to you by email.

For full details, visit our Shipping & Delivery Policy.

VIP Shipping is our upgraded delivery option for customers who would like faster transit after their jewelry has been crafted and dispatched.

VIP Shipping costs $14.90 and typically takes 4–7 business days after dispatch.

Please note that VIP Shipping shortens the delivery stage only. The standard crafting and preparation time of approximately 5–10 business days still applies unless otherwise stated on the product page.

Yes. Once your order has been dispatched, a shipping confirmation containing your tracking information will be sent to the email address used for the order.

You can also follow your shipment through our Order Tracking page.

Please contact us as soon as possible if you need to change the delivery address.

We will make reasonable efforts to update the address before dispatch, but changes cannot be guaranteed once the order has entered the shipping process.

If your shipment appears to be lost in transit, arrives damaged, or you receive an incorrect or incomplete order, please contact support@stdiam.com as soon as possible.

We will review the shipment and work with you on the appropriate next step.

Eligible standard, non-personalized items may be returned within 30 days of delivery, provided they meet the conditions of our Return & Refund Policy.

Returned items should be unworn, unaltered, and include the original packaging, certificates, accessories, and applicable security tags.

Please review our full Return & Refund Policy before returning an item.

If an eligible return is due to personal preference, change of mind, style preference, or ordering the wrong standard size, the customer is responsible for arranging and paying the return shipping cost, unless otherwise required by applicable law.

If an item is verified as damaged on arrival, defective, incorrect, or incomplete due to an error on our part, STDIAM will cover the reasonable associated shipping costs.

Personalized, engraved, bespoke, and qualifying custom-made jewelry is final sale and cannot be returned or exchanged for change-of-mind reasons.

This does not affect your rights if an item is faulty, damaged, incorrect, misdescribed, or where applicable consumer law provides otherwise.

Once an eligible return has been received and inspected, approved refunds are normally issued to the original payment method within 5–7 business days.

Your bank, card issuer, or payment provider may require additional processing time before the refund appears in your account.

Additional fees paid for VIP Shipping or other upgraded delivery services are generally non-refundable, except where otherwise required by applicable law.

Where applicable consumer law requires the original standard delivery charge to be refunded, only the amount corresponding to the least expensive standard delivery option will be refunded.

Authentic STDIAM jewelry is supported by three levels of care:

• Lifetime Stone Guarantee: eligible STDIAM moissanite is protected for life against verified permanent clouding, discoloration, or inherent loss of brilliance caused by a material defect.
• 2-Year Craftsmanship Warranty: protection against verified manufacturing defects in craftsmanship, setting, and structural construction for two years from delivery.
• Lifetime Care Support: ongoing assistance with eligible repairs, resizing, setting inspection, stone replacement, and replating services where technically possible.

Full terms are available on our Warranty & Lifetime Stone Guarantee page.

No. Surface scratches, gradual plating wear, accidental impact, bent prongs, chemical damage, and other normal or accidental wear are not considered manufacturing defects.

These issues may still be repairable through our Lifetime Care Support depending on the jewelry design and condition.

No. Gold plating is a surface finish and will naturally change over time depending on wear, friction, skin chemistry, moisture, cosmetics, perfume, chlorine, and other environmental exposure.

Gradual plating wear is not considered a manufacturing defect. However, replating may be available through our Lifetime Care Support where technically possible.

Where technically possible, we can review authentic STDIAM jewelry for services such as replating, resizing, setting inspection, stone replacement, or repair.

Services outside warranty coverage may involve service, material, or shipping charges. Any applicable cost will be provided for your approval before work proceeds.

Store jewelry clean, dry, and separately when not in use. Avoid direct exposure to perfume, chlorine, bleach, abrasive cleaners, and household chemicals.

We also recommend removing jewelry before swimming, showering, strenuous exercise, or activities that may expose the setting to heavy impact.

For complete care instructions, visit our Jewelry Care Guide.

We choose lab-grown gemstones because they provide another way to create jewelry with less reliance on traditionally mined gemstones.

We aim to describe our materials and sourcing as clearly as possible rather than making broad claims about the entire jewelry supply chain.

Through our One Order, One Tree initiative, eligible STDIAM orders support tree-planting activity through our environmental partner.

Learn more about our current initiatives on our Sustainability page.

STDIAM jewelry is presented in our signature packaging designed to protect the piece during delivery and provide a refined presentation on arrival.

Depending on the item and order, the package may include the STDIAM jewelry box, applicable gemstone documentation, and after-sales or jewelry-care information.