10K
41.7% pure gold
- Color
- A lighter shade of gold
- Durability
- Hardest, resists knocks well
- Best for
- Everyday pieces, bold forms
Materials & Certification
Real worth lives in the details.
Karat, gemstone type, specifications and certification — what’s worth knowing before choosing a piece of lasting value.
T · True Materials
10K, 14K or 18K — what’s the difference?
Karat tells you the pure gold content of an alloy. 24K is too soft to hold gemstones securely, so fine jewelry uses 10K, 14K or 18K.
14K
58.5% pure gold
- Color
- Balanced, moderately warm
- Durability
- Durable, holds settings well
- Best for
- Heavily set designs
18K
75% pure gold
- Color
- The richest, warmest gold
- Durability
- Softer, needs more care
- Best for
- Pieces where the material should speak
Three gold colors
- Yellow goldThe classic shade — warm and at its most vivid under light.
- White goldGold alloyed with white metals — it sets off the whiteness of gemstones.
- Rose goldGold alloyed with copper for a soft, warm rosy tone.
Gemstones
Moissanite, Lab Diamond or natural diamond?
All three shine brilliantly, but they differ in nature, in how they play with light, and in the certificates they come with.
| Moissanite | Lab Diamond | Natural diamond | |
|---|---|---|---|
| Nature | Crystalline silicon carbide | A real diamond grown in a laboratory | A diamond formed in nature |
| Hardness (Mohs) | 9.25 | 10 | 10 |
| Light | High dispersion, vivid color flashes | Bright white, balanced | Bright white, balanced |
| Typical certificate | GRA | IGI · GIA | GIA · IGI |
| Choose it when | You want dense settings and intense sparkle | You want a real diamond with clear specs | You want the rarity of nature |
Certificates
Read a certificate in 5 steps.
A certificate is the record of a gemstone, issued by an independent laboratory. Every T Gold piece comes with a certificate according to its gemstone: GGJ · GRA · IGI · GIA.
Report number
Look it up on the issuing laboratory’s website. Many stones also carry a laser-inscribed number on the girdle.
Gemstone type
Natural diamond, laboratory-grown diamond or Moissanite — clearly stated.
Carat weight
1 carat = 0.2 grams.
Color · clarity · cut
For diamonds: color from D (colorless) downwards, clarity from FL to I, cut assesses how well the stone returns light.
Measurements & shape
Actual dimensions in millimeters and the cutting style, such as round brilliant.
Our principle
Why T Gold never uses
Silver
It tarnishes over time and doesn’t hold value the way gold does.
CZ (cubic zirconia)
A low-value synthetic stone that clouds and scratches with wear.
Plated gold
Only a thin coating over another metal, which wears away over time.
T Gold works only with 10K · 14K · 18K gold and gemstones that can be certified — so today’s brilliance still holds its value years from now.
Every T Gold piece comes with
- Gold karat
- 10K · 14K · 18K
- Gold weight
- Weighed & stated for every piece
- Gemstone type
- Moissanite · Lab Diamond · Natural diamond
- Gemstone specs
- Size · count · technical grading
- Certification
- GGJ · GRA · IGI · GIA
More in the Journal
-
Gemstones
Carat and millimeters: a gemstone size chart by shape
Carat is weight, millimeters are size. Conversion charts for rounds, accent stones and other shapes, why 2 carats is not twice as big as 1, and how to read sizes for Moissanite.
-
Materials
Testing gold at home: what works and what is a myth
Magnets, vinegar, biting, flames: which tests are usable, which are useless or harmful, and which belong with a professional. With a home density test you can do yourself.
-
Materials
White gold, platinum and silver: how the three white metals differ
Alike when new, very different after a few years of wear. Composition, stamps, color over time, hardness, weight and how to tell white gold, platinum and silver apart.
How do you want to be seen?
Share your taste and the occasions you’ll wear it — a T Gold specialist will recommend a configuration made for you.
WORTH, MADE VISIBLE