【PREMIUM】Ametrine Asscher Necklace – 925 Sterling Silver, Rhodium Plated
- Worldwide Shipping
Now available for pre-order on Makuake at a limited special price.
Official-site release is planned for early December 2026.
Amethyst (purple) and citrine (yellow) — two opposing colors fused within a single crystal. Ametrine is a rare bicolor quartz that holds two birthstones: February and November.
A square step cut — the Asscher. Facets stepping toward the center add depth and clear, layered brilliance to the play of purple and yellow. Natural, unheated ametrine, finished by hand in Italian sterling silver 925.
Watch
About Ametrine
Feb · Nov
February · November
Bolivia
Anahí, Bolivia
Ametrine is a rare bicolor quartz in which amethyst and citrine coexist within one crystal. The conditions for these two colors to form naturally are very limited, and natural, unheated ametrine is seldom seen on the market. Its main source is the Anahí mine in Bolivia.
Its stone meanings are "harmony" and "stability." From the way two opposing colors melt together into one, it is said to symbolize balance and calm.
Materials & Craftsmanship
Bolivian Anahí × Italian Silver 925
Natural ametrine, known from Bolivia's Anahí mine, finished by hand in Italian sterling silver 925.
The Asscher cut
A square step cut. Facets stepping toward the center create depth and clear, layered brilliance.
Natural & unheated bicolor
No unnecessary treatment — purple and yellow as nature fused them. No two pieces are ever alike.
Rhodium plated · hypoallergenic
Nickel-free, lead-free Italian silver 925 with a rhodium coating — resistant to tarnish and gentle on the skin.
The fine chain and the thick chain use different clasp sizes. We use lobster clasps sized to each chain's weight, both in Italian sterling silver 925.
Product Details
| Item No. | SN260810 |
| Material | Bolivian natural ametrine (no dye, unheated) / Italian Silver 925 / Rhodium plated |
| Cut | Asscher |
| Size | Approx. 7.5mm |
| Weight | Approx. 1.8ct |
| Chain length | Standard｜16 inch (approx. 40cm) Extended｜18 inch (approx. 46cm) +¥500 UNISEX｜18 inch (approx. 46cm) +¥5,000 |
| Clasp | Lobster clasp (Italian Silver 925) |
Styling Ideas
- Wear the purple-and-yellow bicolor as a subtle accent to a simple outfit
- Pair with white or beige knits and blouses to bring out its clarity
- A birthday gift for those born in February or November — or for someone who cherishes both months
- Choose between the standard chain and the slightly longer extended chain
See Other Items
* Measured by our own method; slight variation may occur.
* As a natural stone, color, shape, size and the way the colors divide vary from piece to piece. Thank you for your understanding.
Discover more about ametrine.
The secret of its bicolor, two birthstones, the legend of Bolivia's Anahí mine, and the meaning of "harmony" — explore our full guide.
Read the Ametrine Guide →SMUK is a Tokyo-based sustainable jewelry brand founded on the philosophy of "Less trash, more marine life" and "Save Wildlife."
Crafted from high-quality sterling silver (925), our pieces are beautifully finished with rhodium or 18K gold plating. We also offer 14K solid gold jewelry, along with refined lines featuring natural gemstones carefully sourced from around the world.
- Due to the nature of the manufacturing process and materials, slight variations in color, shape, or size may occur between individual items. We appreciate your understanding.
- Items made with natural materials each have their own unique character in pattern, color, and inclusions. Product photos are for reference only, and the actual item may differ slightly in appearance and texture.
- While we make every effort to reproduce the true colors as accurately as possible, the appearance may vary depending on lighting conditions and your monitor settings.
- Pre-order items require advance payment and cannot be cancelled once the order has been placed.
- We are unable to accept returns or exchanges for the reasons stated above. In the unlikely event that an item arrives defective or damaged, we will assist you in accordance with our return and refund policy. Before placing your order, please be sure to review our ［Return & Refund Policy］ and ［Shipping Information］.
Pre-order items are products that are currently in production or awaiting restock and cannot be shipped immediately. Please review the following points carefully before placing your order.
- We reserve your stock once the order is confirmed; however, the shipping date may vary depending on production and logistics conditions.
- Payment is required in advance, and orders cannot be cancelled or returned once placed.
- If you order regular items and pre-order items together, all items will be shipped together once everything is ready. If you need the in-stock items sooner, please place separate orders.
- The estimated shipping date is listed on each product page, but it is only a guide and does not guarantee the delivery date.
- In the unlikely event of a production discontinuation or a significant stock shortage, we will contact you individually to arrange a cancellation or refund.
- Changes to an order after it has been placed (item, quantity, shipping address, etc.) cannot be accepted, so please review your order carefully before confirming.
■ Estimated Delivery Time
▼ Domestic Shipping ｜ Flat rate JPY 500 nationwide
※ Free shipping on orders over JPY 10,000.
Delivered in approx. 2–3 business days from your order.
▼ International Shipping
・Asia: approx. 4–7 business days
・Other regions: approx. 7–14 business days
※ Free shipping on orders over JPY 50,000. For orders under JPY 50,000, a shipping fee of JPY 6,000 per delivery applies.
■ About Dispatch
・Orders placed before 10:00 AM (JST): shipped the same day
・Orders placed after 10:00 AM (JST): shipped the same day to the next business day
※ Excluding weekends, public holidays, and year-end/New Year holidays.
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After your order ships, you can check the delivery status via the URL provided in the "Shipment Completion" email we send you.
[Payment Methods]
・Immediate payment: Credit card / PayPal / PayPay / Apple Pay / Google Pay
・Deferred payment: Bank transfer / Convenience store payment / Pay-easy
[Payment Timing]
・Immediate payment: Payment is completed when your order is confirmed, and we begin preparing your shipment right away.
・Deferred payment: Please complete payment within 3 days of your order date. Your item will be shipped once payment is confirmed.
※ A separate handling fee of 220 yen (tax included) applies to convenience store and Pay-easy payments.
Sterling Silver 925 ｜ In Harmony with Nature
At SMUK, we believe in the power of nature.
That is why we care about the intrinsic value of the materials themselves, choosing sterling silver 925 as our main material.
Like natural gemstones, silver holds a gentle, nature-born energy. Since ancient times, it has been cherished as a symbol of intuition, emotion, and protection, quietly accompanying people in daily life.
In recent years, more accessories are simply stainless steel or brass with a silver-colored coating. They may look alike, but when the material itself is different, there is a real difference in how gentle it feels on the skin and how comfortable it is to wear.
By choosing with sincerity, down to the parts that no one sees, SMUK creates jewelry that feels good and can be loved for years to come.
▼ Learn more
"Choosing Sterling Silver 925: Jewelry That Lives with the Power of Nature"
https://smuk.jp/en/blogs/journal/silver-925-natural-jewellery
SMUK jewelry features four types of plating finishes, chosen according to the material and intended use.
- Rhodium Plating
A finish using a rare platinum-group metal. Highly resistant to tarnish and scratches, with a clear, luminous silver color. Suitable even for those with sensitive skin. - 18K Gold Plating
75% pure gold plated over sterling silver, creating a warm, deep golden color. - 14K White Gold Plating
A white gold finish of 58.3% purity. Its soft white tone pairs beautifully with pearls and delicate designs. - Gold Vermeil
A gold layer of at least 2.5 microns applied over a sterling silver 925 base. More durable than standard plating, keeping its shine for longer.
For details on the characteristics and care of each finish, please see:
https://smuk.jp/en/blogs/journal/jewelry-plating-guide
