【PREMIUM】Round Opal Necklace – 925 Sterling Silver, Rhodium Plated
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A pendant necklace with a natural Ethiopian opal cut into a perfect circle. The rounded, well-balanced form is said to symbolize balance and harmony, and blends naturally into any style. Thanks to opal’s signature play-of-color, the hue shifts moment by moment through blue, green, and orange with every touch of light—so even the same stone never shows the same expression twice.
Ethiopian opal forms as rainwater seeps over long ages into silica rock born of volcanic activity. It’s a necklace that lets you wear a one-of-a-kind brilliance created by nature quietly at your neckline.
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About Opal
October
October Birthstone
Scorpio
Oct 24 – Nov 22
Libra
Sep 23 – Oct 23
Ethiopian opal forms as rainwater seeps over long ages into silica-rich rock deposited by volcanic eruptions, building up silica layer by layer. Its “play-of-color”—shifting, multicolored light born from the refraction of light—is opal’s greatest characteristic. Even viewed from the same angle, a single change in how the light strikes reveals an entirely different expression—the unique charm of this stone.
Long cherished as a stone of hope, positivity, and inspiration, opal is said to heighten the wearer’s sensitivity and creativity, giving the strength to move forward without fearing change. It is October’s birthstone, associated with Libra and Scorpio.
Materials & Finish
The thin and thick chains use different clasp sizes. Each uses a spring-ring clasp sized to the weight of its chain, and both are Italian sterling silver 925.
Ethiopian Natural Opal × Italian Sterling Silver 925
A pendant combining a play-of-color Ethiopian natural opal with high-quality Italian sterling silver 925. Two materials that draw out each other’s character in a refined pairing.
Rhodium Plating
A rhodium coating on the silver surface makes it resistant to tarnish and scratches. It keeps its beautiful shine for a long time and suits everyday wear.
A Balanced, Perfect Circle
Cut into a perfect circle, the opal takes a form that symbolizes harmony and balance. It works as a simple yet present accent at the neck.
Hypoallergenic
Made with nickel-free, lead-free Italian sterling silver 925. The rhodium plating further reduces the metal’s contact with the skin.
Product Details
| Item No. | SN260302 |
| Material | Ethiopian Natural Opal / Italian Sterling Silver 925 / Rhodium Plating |
| Opal | Approx. 5mm / 0.32ct |
| Chain Length |
Thin chain (standard) | 16 in. (approx. 40cm) Thin chain (extended) | 18 in. (approx. 46cm) Thick chain / unisex | 18 in. (approx. 46cm) |
| Chain Width |
Standard: 0.1cm wide Thick chain: 0.2cm wide |
Styling Ideas
- Pair with a white shirt or plain top to add a subtle shimmer at the neck. The opal’s play-of-color brings just the right touch of color to a simple outfit
- An accent for a dress or formal look. The perfect-circle form is elegant and unfussy, blending naturally into any dressed-up scene
- As October’s birthstone, it also makes a lovely birthday or anniversary gift. The beauty of its play-of-color is sure to surprise whoever receives it
- Layer it with other shapes like marquise or oval to enjoy the interplay of different forms
Explore Other Shapes
※ Measurements are taken using our own method; slight variations may occur.
※ As this is a natural stone, there are individual differences in color, shape, and size. Thank you for your understanding.
More on the Story of Opal.
From play-of-colour and meaning to October's birthstone and zodiac, and SMUK's opal jewellery — it's all in this guide.
Read the Opal 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
