The technology

AeroGold. Gold, engineered.

Our proprietary 14K gold system. Nearly twice the hardness. 60% less gold. All of the light.

Shop AerQuestions, answered

AeroGold

Softness is why gold jewelry is heavy. We fixed the softness instead.

Soft metal needs mass to survive daily wear — so tennis bracelets have always carried more gold than their design strictly needs. AeroGold takes the opposite path.

AeroGold is our proprietary 14K gold system: three decisions working together. Hard-grade 14K — in yellow, white, and rose — chosen because 14K is naturally harder than 18K; an engineering choice, not a compromise. A controlled thermal hardening cycle after casting, raising the metal to nearly twice the hardness of untreated cast gold. And thin-section engineering — structures designed so every gram carries load, and none of it is decoration.

The result: 60% less gold than a conventional tennis bracelet of equal length and stone count, with the savings passed straight into the price.

Hardened by heat.

Hardened by heat.

A thermal cycle after casting — nearly twice the hardness of untreated cast gold.

Grown, not mined.

Grown, not mined.

Identical in composition and brilliance to mined diamonds.

Loose diamonds, certified.

Every loose stone we sell above 0.25 ct carries an IGI report — verify it at igi.org.

The numbers.

  • 60%
    less gold, same presence
  • ≈2×
    the hardness of untreated cast gold
  • $799
    1.3+ carats total weight, to start
  • 14K
    AeroGold — yellow, white, rose

Side by side.

Classic tennis bracelet Lychora Aer
Gold usage Baseline 60% less
Diamonds Lab-grown Lab-grown
Price, ~1.4 ctw · 7" $1,895 From $799

Gold savings measured against a conventional tennis bracelet of equal length and stone count. Hardness compared to as-cast, non-heat-treated 14K gold. Classic price: comparable 1–1.5 ctw, 7-inch lab-grown tennis bracelet from a leading online jeweler, as of July 2026.

Questions, answered.

What is AeroGold?
AeroGold is our proprietary gold system rather than a single ingredient. Three parts: hard-grade 14K gold in yellow, white, and rose; a controlled thermal hardening cycle after casting that raises the metal to nearly twice the hardness of untreated cast gold; and thin-section engineering, so every gram carries load. Together, they let a bracelet use 60% less gold without feeling fragile.
Is 14K lower quality than 18K?
It is less pure — 58.3% gold versus 75% — and that is exactly why it is harder and more scratch-resistant. For pieces engineered thin and worn daily, 14K is the right tool, not a compromise.
Thin gold — will it bend?
Thin does not mean delicate. AeroGold pieces are hardened specifically for everyday wear, and the structure is engineered so the metal works as one continuous spring rather than a chain of weak points. Every piece is covered by our 30-day returns — if anything ever feels off, write to us and we make it right.
How is the white gold finished?
Our 14K white AeroGold is rhodium-finished for a bright, mirror white. [PLACEHOLDER: owner to confirm nickel-safe / sensitive-skin claim before publish.]
Are lab-grown diamonds real diamonds?
Yes. They are identical in composition and brilliance to mined diamonds — same hardness, same fire. The difference is origin, not the stone.
Why does it cost less?
Two honest reasons: the pieces use 60% less gold by design, and lab-grown stones cost a fraction of mined equivalents. We price from those inputs and skip the traditional markup.
Are the diamonds certified?
Bracelet stones are small melee — stones this size don't carry individual reports anywhere in the industry. Loose diamonds we sell above 0.25 carat ship with IGI reports, laser-inscribed and verifiable at igi.org.