Twin Koi Fish Ring with Black Onyx β .925 Sterling Silver Band
SKU: 3348
Thirty-two grams of solid .925 sterling silver with a genuine black onyx dome sitting dead center. The onyx is smooth, polished to a mirror-like depth that absorbs light instead of reflecting it β a dark anchor between two koi fish carved in full relief on either side. The face measures 25mm x 28mm, making this one of the largest koi rings in the collection. Both fish curve around the stone nose-to-tail, with individually carved scales, fin membranes, and gill plates defined by oxidized grooves that go nearly black in the recesses.
Best Suited For
If you want a dark stone that disappears into the silver design β black onyx doesn't compete with the koi carving the way a blue or red stone does. It absorbs light and creates a void at the center that pulls your eye inward, making the silver fish circling it the main event. The contrast between polished black and antiqued silver reads as deliberate restraint.
If you want a genuine natural stone at this size β the onyx is real, not synthetic. It's cut as a smooth cabochon dome and bezel-set so the metal surrounds and protects it on all sides. Black onyx sits at 6.5-7 on the Mohs scale β harder than turquoise, comparable to garnet β so it handles daily wear without showing surface damage easily.
If you collect heavy statement rings and want something with cultural weight β 32 grams is the heaviest tier in the koi collection, tied with the turquoise and tiger's eye versions. But the black colorway gives this one a different mood entirely. Black and silver together lean gothic-meets-Japanese β a cross-cultural aesthetic that works with leather, dark denim, or a suit cuff.
What Wearing It Actually Feels Like
The onyx dome catches light differently than a faceted stone β it holds one soft highlight that shifts as you move your hand, almost like a dark eye following you. Under direct sunlight, the stone reveals a faint translucency at the thinnest edges. Under indoor lighting, it looks completely opaque and bottomless. The effect is subtle enough that most people won't notice unless they look closely.
The twin koi flanking the stone have the same scale-by-scale detail as every other 32-gram ring in this collection. Each fish body follows the curve of the bezel, with tail fins extending toward the shank. The oxidized patina between the scales creates a dark-light contrast that makes the design readable from arm's length β you don't need to squint to see the fish.
Heads up: The 25mm x 28mm face is slightly wider than the turquoise and tiger's eye versions (23mm x 28mm). That extra 2mm means the ring sits a fraction wider on your finger. On sizes below US 8, the face may extend slightly past the edges of the finger β it's a design choice that adds to the visual impact, but check your finger width if proportional fit matters to you.
The weight keeps the ring from spinning or shifting β once you set it in position, it stays there. The inner band is polished smooth with the .925 hallmark stamped inside. After a few weeks of daily wear, the raised tops of the koi scales develop a brighter polish from friction while the recessed areas darken further. The ring essentially finishes itself the more you wear it.
The Details That Matter
What People Want to Know
Q: What's the difference between this and the turquoise or tiger's eye koi ring?
Same twin koi design and 32-gram weight. The face here is 25mm x 28mm β 2mm wider than the turquoise and tiger's eye at 23mm x 28mm. The biggest difference is the stone: black onyx is dark and absorbing where turquoise glows blue-green and tiger's eye shimmers gold. Choose based on the color mood you want.
Q: Is black onyx durable enough for everyday wear?
At 6.5-7 on the Mohs scale, onyx is harder than turquoise (5-6) and comparable to garnet. It handles daily wear well. The bezel setting adds an extra layer of protection β the metal rim absorbs impacts that would otherwise hit the stone's edge. You'd have to hit it hard against a concrete surface to chip it.
Q: Why do the twin koi circle the stone instead of swimming in one direction?
The twin koi circling each other mirrors the yin-yang concept in Japanese art β two forces in balance, neither leading, neither following. On a ring, the circular motion also follows the band's natural shape. The design is both symbolic and structural β the koi bodies act as a frame that secures the bezel from both sides.
The Numbers
You Might Also Want
Same 32-gram weight with a color shift β the turquoise koi fish ring swaps the dark onyx for a blue-green genuine turquoise stone at a 23mm x 28mm face.
For warm earth tones instead, the koi fish tiger's eye ring uses a chatoyant golden-brown stone at the same 32-gram weight.
Browse all designs in the koi rings collection for Japanese fish rings in .925 sterling silver.