North Star Lab-Grown Diamond Coin Necklace

The North Star coin necklace features a lab-grown diamond at the center of a carving inspired by the North Star. The luster of the precious metal and the delicate shading add a subtle sparkle to your neckline.

Available in Pt900 platinum and 18K yellow gold, as well as three sizes: S, M, and L. You can also have initials or dates engraved on the back, making it a piece that carries your cherished sentiments.

Product Specifications & Size

Product Number
JD250070N-LGD

Metal
Top: Pt900 Platinum / 18K Yellow Gold

Stone
Lab-grown diamond (Round Brilliant Cut)
DE Color / VS Class / Equivalent to VG-EX
S: Approx. 2mm diameter / approx. 0.04ct
M: Approx. 2.5mm diameter / approx. 0.07ct
L: Approx. 3mm diameter / approx. 0.1ct
Diamond grading report is not included.

Top Size (H x W x D)
S: Approx. 20 x 13 x 1.2mm
M: Approx. 23 x 16 x 1.2mm
L: Approx. 27 x 20 x 1.2mm
*Height includes the bail.

Top Weight
Pt900: S approx. 3.2g / M approx. 4.8g / L approx. 7.5g
K18: S approx. 2.5g / M approx. 3.8g / L approx. 5.8g

Standard Chain
Venetian: Total length 45cm, width approx. 0.7mm
Cable: Total length 45cm, width approx. 1.1mm
Material: Pt850 / 18K Yellow Gold (corresponds to top metal)
Both feature slide-style adjusters for length adjustment.

You can choose the chain type, length, and width, or select the top only from the options. The 1.3mm and 1.5mm width cable chains do not have length adjustment; all others are slide-style. Additional charges for the selected chain are included in the product price.

Engraving
The metal type and diamond carat weight are engraved as standard.
Simple hand-stamped engravings such as initials or dates on the back are free of charge.
Laser engravings for large initials, messages, or designs are subject to additional fees and require a quote.
For desired engravings, please contact us for consultation.

Accessories
Jewelry box, quality guarantee and warranty card

Delivery Time
Made-to-order: Approximately 3 weeks to 1 month from the order date (confirmation of payment method). Estimated delivery times will be provided in the order confirmation email.
As these are made-to-order items, cancellations after placing an order and returns after delivery are not accepted.

What are Lab-Grown Diamonds

About Diamond Quality

We offer free nationwide shipping within Japan, including Okinawa and remote islands.

For made-to-order items, the estimated delivery time is approximately 3 weeks to 1 month after your order and payment are confirmed. Please check the information for each specific product regarding stock items and individual delivery times.

Once your order has shipped, we will provide a tracking number so you can check the delivery status.

Your order will be delivered in simple gift wrapping, with a ribbon tied around the jewelry box. A shopping bag for gifting is also included.

You may also choose a message card. We can print a custom message on the back of the card.

You can use the following payment methods.

■ Credit Card
Visa/Mastercard/American Express/JCB

■ Other Payment Methods
Shop Pay/Apple Pay/Google Pay

Please select from the methods displayed on the checkout screen when completing your purchase.

If you have any questions regarding payment, please contact us before placing your order.

■ Returns and Exchanges Due to Customer Convenience
We do not accept returns or exchanges due to customer convenience for made-to-order items, special order items, custom-made products, items that have undergone processing such as engraving or resizing, and earrings.

For eligible return items, please contact us within 8 days of receipt. Shipping costs for returns due to customer convenience are at the customer's expense.

■ Cancellations
If you wish to cancel your order, please contact us promptly. Please note that cancellations may not be accepted once production, procurement, or processing has begun.

■ Initial Defects or Incorrect Shipments
Please contact us within 8 days of receipt. We will handle the matter after confirming the situation. The costs for return shipping and re-shipment in cases where we are responsible will be covered by our shop.

For more details, please check our "Return and Refund Policy."

To ensure you can enjoy your precious jewelry for years to come, we offer various repair and after-sales services after your purchase.

Whether a repair is possible and its cost depends on the type and condition of the product. Please check the details below for information on warranty coverage, estimated repair costs, and the service process.

After-sales Service and Repairs →