7th Anniversary
gemstone: Onyx.
Seven years — onyx, strata in black and white
Quick answer
The 7th anniversary gemstone is Onyx. The 7th anniversary gemstone is onyx — and not by accident: onyx is agate built in layers, band upon band of black and white, which is simply what seven years of marriage looks like in cross-section. Wool is the traditional seventh gift, warm and unglamorous and durable; onyx is its formal twin, the stone of evening elegance that never needed color to make a statement. One honest note for the buyer: most black onyx on the market is agate dyed black, a centuries-old practice — natural solid-black onyx exists but is the exception worth naming.
7th anniversary gift ideas
- ✓An onyx pendant in gold — high contrast, zero fuss
- ✓Black onyx studs framed in gold for evening wear
- ✓A banded agate ring that shows its strata honestly
Onyx for your 7th
The 7th anniversary is the onyx anniversary. Every piece below can be personalized with her own birthstone in a onyx setting — onyx for the milestone, her stone for her.
6-Stone necklace
Family Tree Birthstone Necklace
✦ Choose 2-6 birth months to represent your family
2-Stone ring
Birthstone Stack Ring Set (2 Rings)
✦ Choose 2 birth months for the two stones
S925 Sterling Silver
Birthstone Drop Necklace — All 12 Months
✦ Choose your birth month — 12 natural gemstones
18K Gold Vermeil
Birthstone Charm Hoops
✦ Choose birth month(s) — stack up to 4 charms per hoop
7th anniversary FAQ
What is the gemstone for the 7th anniversary?
The 7th anniversary gemstone is onyx. Wool or copper are the traditional seventh-year gifts; onyx is the assigned stone — layered black-and-white agate, historically the gem of formal elegance, and one of the few anniversary stones that suits menswear as naturally as womenswear.
Is black onyx naturally black?
Rarely. Most commercial black onyx is gray agate dyed black — a permanent, accepted treatment used since Roman times. Sellers who state "natural black onyx" are offering the uncommon exception and pricing it accordingly; either version is a genuine stone, but the label should tell the truth.