Understanding Gold Purity: 10K, 14K, 18K & BIS Hallmarking Explained
Vishv Gadhiya
Founder & Master Gemologist • Surat Atelier
"Pure 24 Karat gold is poetically revered, but in the realm of everyday fine jewellery, it is naturally soft, malleable, and prone to bending. To securely hold valuable diamonds in place and withstand decades of daily wear, gold is alloyed with strengthening metals such as copper, silver, and zinc. Understanding karats is key to making the smart choice for your lifestyle."
1. 14K vs 18K: The Ideal Everyday Sweet Spot
18K gold contains 75% pure gold (750 parts per thousand). It provides a rich, opulent warm golden hue and prestige, making it popular for high-end engagement rings and occasion jewellery. 14K gold contains 58.5% pure gold (585 parts per thousand). It offers exceptional resistance against dents, scratches, and prong deformation—making it the most popular choice for modern everyday wear.
Key Gemological Highlights
- 14K Solid Gold (585): Maximum durability, perfect for daily active lifestyles
- 18K Solid Gold (750): Richest golden glow, high purity heirloom choice
- Available in Yellow Gold, Rose Gold, and White Gold across all designs
2. Yellow, White & Rose Gold: How Colors are Created
Pure gold is naturally yellow. White gold is created by alloying pure gold with white metals like palladium and nickel, followed by a rhodium plating finish that imparts a mirror-like platinum sheen. Rose gold achieves its romantic blush by incorporating a higher proportion of copper in the alloy.
3. The Mandatory BIS HUID Hallmark in India
Under Government of India regulations, every piece of gold jewelry sold must bear the Bureau of Indian Standards (BIS) Hallmark. This includes: (1) The BIS triangular emblem, (2) The purity grade (750 for 18K, 585 for 14K), and (3) A 6-digit alphanumeric Hallmark Unique Identification (HUID) code verifying testing by certified assay centers.
“BIS Hallmarking ensures you get exactly what you pay for—down to the exact milligram of pure gold.”
The Gadhiya Atelier Perspective
Whether you choose 14K for high-activity durability or 18K for regal warmth, Gadhiya Jewels crafts every piece with certified hallmarked gold.
Vishv Gadhiya
Founder & Master Gemologist • Gadhiya Jewels Surat
Specialist in precious metallurgy, gold alloying, and fine jewelry manufacturing.
