Onyx Swiss Blue Topaz Necklace in Sterling Silver, 18 Inch
Chain length guide

Product information
- Metal925 White sterling silverPolished
- StoneOnyx18 x 1.75 mm tbd
- Size18 inChain length
- Weight1.71 gTotal item weight
Description
Deep black onyx anchors this onyx Swiss Blue Topaz necklace in sterling silver, with bright blue accents that stand out against the dark stone. The sterling silver carries a polished rhodium finish that gives a crisp, bright shine, and small yellow accents add warmth. The pendant hangs from a woven spiga chain and the lobster clasp closes securely at the back. Wear it with a white tee and denim or a black dress for an evening out. A thoughtful pick for anyone born in December.
Key Features
- Crafted in 925 sterling silver with a polished finish
- Finished with silver tone plating for lasting brilliance
- Set with black onyx
- Spiga wheat necklace design
- Measures 12.9 mm wide and 18 inches long
- Secured by a lobster clasp
- Approximate weight of 1.71 grams
Why You’ll Love It
- Black and blue make a striking pairing that stands out without feeling loud.
- The woven chain adds texture and movement beneath the pendant.
- Easy to dress up for evening or keep for everyday.
- A polished finish gives it a bright, clean look.
Perfect For
Suited to birthdays, Christmas, Valentine's Day, Mother's Day, anniversaries, graduations and everyday wear. A fitting gift for women, and a fine choice for anyone born in December or treating themselves.
Product details925 white sterling silver · Onyx · 1.71 g
Metal
- Metal
- White sterling silver
- Purity
- 925
- Finish
- Polished
- Accent material
- 14K Gold
- Accent color
- Yellow
- Chain metal
- Sterling Silver
- Chain plating
- Rhodium
- Charm plating
- Rhodium
Center stone
- Stone
- Onyx
- Origin
- Natural
- Size
- 18 x 1.75 mm
- Carat weight
- 0.49 ct
- Color
- Black
- Number of stones
- 1
- Total gem weight
- 0.65 ct. tw.
Accent stones
- Stone
- Swiss Blue Topaz
- Number of stones
- 8
- Carat weight
- 0.16 ct
- Color
- Blue
Measurements
- Pendant length
- 14.45 mm
- Pendant width
- 12.9 mm
- Chain length
- 18 in
- Chain width
- 1.9 mm
- Clasp
- Lobster
- Weight
- 1.71 g
Style & design
- Necklace type
- Necklace with Pendants
- Chain style
- Spiga (Wheat)
- Style
- Modern
More
- Made in
- Thailand
- Birthstone
- December
- Item #
- SJQG-QTC1804
Our standards
- Stamped with its metal type (e.g. 14K, 925)
- Colored gemstones are ethically sourced
Length & fitLength guide · 30-day length exchanges

If the length isn’t right, you can exchange it within 30 days of delivery.
Shipping & returnsFree insured shipping over $99 · 30-day returns
Free, insured shipping on US orders of $99 or more.
Return it within 30 days of delivery, unworn and in its original packaging.
Exchange it within 30 days for another size or another piece.
Covered by our One-Year Limited Jewelry Warranty against manufacturing defects.
What’s in the boxYour necklace in our signature blue padded gift box
- Your necklace
- Our signature blue padded jewelry gift box
- A packing slip with no prices on it
Jewelry careStore each piece on its own in a soft pouch
Store each piece on its own in a soft pouch or lined box, so nothing scratches it.

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Onyx Necklaces, answered
Straight answers about onyx necklaces. See all Onyx Necklaces
- Free Shipping
- US Orders $99+
- Exchanges
- 30 Days
Is the onyx in these necklaces natural or treated?
Check each product page for whether the onyx is natural or lab-created. In general, most black onyx on the market is dyed or heat-treated to reach an even, deep black. That is a standard, widely accepted practice and gives the stone its consistent glossy color.
Which onyx necklace styles are most popular?
Stainless steel onyx styles and sterling silver single stones lead the list. Near the top are a textured black onyx necklace, beaded strands with tiger's eye or golden tones, and an inlay rectangle design. Sterling silver circle, checkerboard-cut, and halo styles follow close behind.
What affects the price of onyx necklaces?
Metal, stone size, and design drive the price. Sterling silver and stainless steel differ in cost, and a larger onyx, added cubic zirconia accents, or a longer beaded strand also change it. Use the Price filter on this page to set a budget.
What length of onyx necklace should I choose?
An 16 to 18 inch length sits near the collarbone. Many sterling silver pendants-style pieces here come in 16 or 18 inches, while stainless steel strands run 22 to 34 inches for a bolder, layered look. Children's styles are 14 inches, a snug fit for smaller necks.