24th Anniversary
gemstone: Tanzanite.
Twenty-four years — tanzanite, the youngest gem on earth
Quick answer
The 24th anniversary gemstone is Tanzanite. The 24th anniversary gemstone is tanzanite, and its biography is the youngest in jewelry: found in 1967, in one four-kilometer strip of northern Tanzania at the foot of Kilimanjaro, and found nowhere else on the planet before or since — a gem literally rarer than diamond, discovered within living memory. Twenty-four years of a marriage may feel long; measured against tanzanite’s timeline it is almost simultaneous. The stone’s blue-violet depth, like sapphire with twilight in it, arrives by gentle heating of brown zoisite crystal — the standard, accepted treatment nearly all tanzanite carries.
24th anniversary gift ideas
- ✓A tanzanite pendant — sapphire’s color at a kinder price
- ✓Tanzanite drop earrings, the violet-blue for special evenings
- ✓A tanzanite and diamond-white cluster for the run-up to silver
Tanzanite for your 24th
The 24th anniversary is the tanzanite anniversary. Every piece below can be personalized with her own birthstone in a tanzanite setting — tanzanite 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
24th anniversary FAQ
What is the gemstone for the 24th anniversary?
The 24th anniversary gemstone is tanzanite — the blue-violet zoisite discovered in 1967 in a single mining area near Mount Kilimanjaro, Tanzania, and found nowhere else on earth. It is also December’s modern birthstone, which makes it a double-duty gift for a December-born wife.
Is tanzanite heated, and does that matter?
Virtually all tanzanite on the market is gently heated to turn its naturally brownish zoisite crystal into the famous blue-violet — a permanent, universally accepted treatment, not a disguise. What matters more at purchase is size windowing: tanzanite is pleochroic and can look lighter face-up than from the side, so judge the color you see straight-on, from normal viewing distance.