Bangkok · Since 1993
True luxury begins with uncompromising quality.
More than three decades of fine natural diamond jewellery, built on knowledge before craftsmanship.
Our Story
Knowledge before craftsmanship.
Founded in 1993 by Sanjay Kothari, Anju Diam Co., Ltd. was built on knowledge before craftsmanship. Beginning as a trader of loose diamonds, Sanjay Kothari dedicated years to understanding every facet of a diamond — its quality, grading, brilliance, and value. This pursuit of excellence laid the foundation for what would become a trusted name in fine diamond jewelry.
As expertise grew, so did the vision. Through extensive research into precious gemstones, precious metals, and evolving jewelry design, Anju Diam Co., Ltd. expanded into creating exquisite fine jewelry that seamlessly blends timeless elegance with contemporary sophistication.
Today, the company embodies the philosophy of quiet luxury — pieces that speak through exceptional craftsmanship rather than excess. Our designs are refined, versatile, and created for those who appreciate understated elegance. While our values remain rooted in tradition, our approach continues to evolve with the lifestyles and tastes of each new generation.
The House Standard
Exceptional jewellery begins with exceptional materials.
Every creation is thoughtfully crafted in 18-karat gold and set with carefully selected natural diamonds of G colour or higher and VS clarity or above. Every stone is earth-mined, never laboratory-grown, and chosen for its brilliance, purity and beauty without compromise.
18-karat gold
The only metal we work in
G colour or higher
Never a stone below it
VS clarity or above
Eye-clean, every piece
Craftsmanship
Maximum light, without excess.
Our expertise in fine diamond jewelry and illusion settings allows us to create pieces that maximize light, brilliance, and visual impact while maintaining elegance and wearability. From timeless classics to contemporary designs, every piece reflects precision, artistry, and meticulous attention to detail.
At Anju Diam Co., Ltd., luxury is also personal. We understand that every client has a unique vision, which is why customization is central to our philosophy. Whether reimagining a classic silhouette or bringing a bespoke design to life, we work closely with every client to create jewelry that is deeply personal and enduring.
An illusion setting places small natural diamonds into a mirror-finished plate cut to their exact girdle line. Light carries across the join, so the cluster reads as a single larger stone — the same presence, at a fraction of the stone cost.
Three Decades
How the house was built.
1993
A diamond trader in Bangkok
Sanjay Kothari begins trading loose diamonds, spending years learning to read a stone — its quality, its grading, its brilliance and its true value.
2000s
From stones to jewellery
Research into precious gemstones, metals and evolving design takes the house from trading into making — fine commercial jewellery, built on the same knowledge.
Today
A speciality in illusion settings
The house becomes known for illusion work: hand-cut, mirror-finished plates that extend a diamond's spread far beyond its carat weight.
Always
One promise
Uncompromising quality, honest value, and timeless craftsmanship. Every piece designed to celebrate a meaningful moment and become an heirloom.
Because true luxury is never loud — it is crafted with purpose, worn with confidence, and treasured forever.
For more than three decades, Anju Diam Co., Ltd. has remained committed to one promise: delivering uncompromising quality, honest value, and timeless craftsmanship. Every piece is designed to celebrate life’s most meaningful moments and become an heirloom that will be cherished for generations.
A Legacy of Brilliance