Aino LUMIÈRE

Aino LUMIÈRE

Select Language
Select Currency

© 2026 MAISON LUMIÈRE

Detailed guide to jewelry materials including silver, gold, and alloys

The Essential Guide to Jewelry Materials: From S925 to 18K Gold

July 7, 2025

Demystifying jewelry materials: From the S925 hallmark to the durability of Titanium steel and the luxury of 18K gold. Everything you need to know before your next purchase.

Article Visual

Confused by jewelry hallmarks and material types? You’re not alone. Whether you’re a collector or a first-time buyer, understanding what goes into your favorite pieces is essential. Grab your notebook—here is your definitive guide to jewelry materials.

925 Sterling Silver: The Timeless Standard

Known as 'Sterling Silver,' 925 silver contains 92.5% pure silver. Look for the 'S925' hallmark—where 'S' stands for Silver—engraved on the inner band or clasp. It is the perfect balance of purity and durability for daily elegance.

Karat Gold (K-Gold): The Spectrum of Luxury

K-Gold is an alloy of pure gold and other metals. The 'K' value (9k, 14k, 18k, 24k) indicates gold purity; higher K means richer color and higher value. By adjusting the alloy mix, we achieve stunning variations like White Gold, Rose Gold, and Classic Yellow Gold. 14k and 18k are industry favorites for their superior hardness and design versatility.

Alloy & Costume Materials

Commonly used in fashion jewelry, alloys like Copper, Zinc, or Lead-Tin mixtures offer high plasticity and lower melting points, allowing for intricate, bold designs that remain lightweight and accessible.

Titanium Steel (316L Stainless Steel)

Often called 316L Surgical Steel, this material is celebrated for its extreme corrosion resistance. A dense chromium oxide film forms on the surface, preventing oxidation and making it an ideal choice for sensitive skin and active lifestyles.

Gold Plating: The Golden Touch

Gold plating involves electroplating a layer of real gold over a base metal (like silver or brass). While it adds a luxurious finish and temporary corrosion resistance, remember that plating can wear over time. Avoid contact with sunscreens and sanitizers to keep that golden glow lasting longer.

MaterialPurity/CompKey FeatureCare Level
925 Silver92.5% SilverS925 HallmarkModerate
18K Gold75% Pure GoldHigh Value & DurableLow
Titanium Steel316L SteelAnti-corrosionVery Low
Gold PlatedGold over BaseAffordable LuxuryHigh

Featured Collection

More from Maison Lumière

Industry Secrets: Choosing Between Natural, Lab-Grown, Moissanite, and CZ
Mar 31, 2026

Industry Secrets: Choosing Between Natural, Lab-Grown, Moissanite, and CZ

An industry insider explains the definitive differences between Natural Diamonds, Lab-Grown Diamonds, Moissanite, and CZ. Learn how to choose the right stone for your budget and style.

The Essential Guide to Jewelry Materials: From S925 to 18K Gold
Jul 7, 2025

The Essential Guide to Jewelry Materials: From S925 to 18K Gold

Demystifying jewelry materials: From the S925 hallmark to the durability of Titanium steel and the luxury of 18K gold. Everything you need to know before your next purchase.

How to Keep Your Pearls Glowing: The Definitive Maintenance Guide
Jun 19, 2025

How to Keep Your Pearls Glowing: The Definitive Maintenance Guide

Unlock the secrets to lifelong pearl luster. Learn why pearls "breathe," the critical things to avoid, and the professional "Last On, First Off" styling rule.

The Golden Ember: Rediscovering Tiger’s Eye in Modern Minimalist Design
Feb 19, 2025

The Golden Ember: Rediscovering Tiger’s Eye in Modern Minimalist Design

Explore the captivating allure of Tiger’s Eye. From its ancient protective origins to its place in the modern professional's wardrobe, discover why this chatoyant gemstone is the season's must-have neutral.

Here, pearls can be "artificial" - Zhuji Pearls
Nov 30, 2024

Here, pearls can be "artificial" - Zhuji Pearls

Explore Zhuji, Zhejiang, China—the city that supplies 80% of the world's freshwater pearls. From the pearl cultivation ponds of Shanxiahu to the high-end jewelry workshops in Paris, we will delve into the science and history of cultured pearls.

The World's Most Coveted: Top 6 Most Expensive Gemstones of 2024
Sep 19, 2024

The World's Most Coveted: Top 6 Most Expensive Gemstones of 2024

Dive into the elite world of high-stakes gemology. From the deep blues of the ocean to the rarest reds, we rank the six most expensive gemstones on the planet today.