Materials

What your piece is made of

The house works in two materials, and only two: solid 925 sterling silver and lab-created moissanite. Everything below is the full specification.

01

925 sterling silver

92.5% pure silver, alloyed for strength — which is all the word sterling is legally allowed to mean. Solid the whole way through, never a plating over something cheaper — just a bright platinum finish over solid silver. It tarnishes and polishes back: the honest life of a real metal. A soft cloth and a dry drawer keep it bright; a little patina is the silver living, not a fault.

Purity
92.5% silver (925)
Construction
Solid 925 — not plated over base metal
Used in
Every Noctaura piece
Tarnish
Normal — polishes back
02

Lab-created moissanite

Silicon carbide, grown in a lab: a gemstone in its own right, with more fire than a diamond and a fraction of the cost. It is moissanite, not diamond, and it is named as moissanite everywhere it appears. Moissanite is graded to the maker’s standard rather than independently certified. Every one of these numbers is set beside a mined diamond’s in our guide, moissanite vs diamond: every number compared.

What it is
Lab-grown silicon carbide
What it is not
A diamond — ever
Fire
Dispersion 0.104 (a diamond is 0.044)
Hardness
Mohs 9.25 (a diamond is 10)
Grading
Maker’s standard, not independently certified
03

And nothing else

The house works in two materials. No gold vermeil, no gold-fill, no plated brass, no mystery alloy. A short list is a deliberate one: every metal the house works in is named on this page before it reaches a piece.

Materials
2
Finish
Platinum over solid 925 silver
Gold vermeil
Not offered
Stones
Lab-created, always
Demi-fine, defined

Between costume and fine

Demi-fine sits between costume and fine jewelry: real precious materials — solid 925 silver, lab-created stones — at a price built for wearing, not for a safe. The value is in silver you actually put on, not in carats locked away.

Prices are tethered to real material value. Single pieces run $99–$395; multi-piece suites run $425–$1,036.

The specification

Every material claim, in one place

The full material specification behind every piece in the house.

The material specification, claim by claim.
The claimStatus
Every Noctaura piece is 925 sterling silverVerified
Sterling is 92.5% pure silver, solid — not plated over base metalVerified
No piece is gold vermeil or gold-filledVerified
Every piece carries a platinum finish over solid silverVerified
Every stone is lab-created moissanite, not a diamondVerified
Moissanite is silicon carbide, Mohs 9.25Verified
Moissanite has more fire than diamond — dispersion 0.104 vs 0.044Verified

Now that you know what it’s made of — here is how to keep it that way. For what the grades on a stone actually mean, read moissanite colour grades and clarity, explained.

Care & longevity Shop the pieces
The Comparison

Moissanite vs Mined Diamond

Two different stones, compared by the numbers. Choose a property.

Moissanite
Mined Diamond

The Honest Sum More fire, more brilliance, a known origin, a fraction of the price — and diamond remains the harder stone. We would rather you know all of it.