The Original Architects of the Gem Growing Industry
Over 80 years ago, Carroll Chatham introduced the world to laboratory grown emeralds. By duplicating the conditions deep within the earth, his laboratory succeeded in growing the finest gems over the course of a year’s time. A discovery so unique, it remains a carefully guarded corporate secret to this day. Chatham is now recognized worldwide as the industry leader in luxury laboratory grown gemstones and diamond jewelry.
We provide the highest quality lab grown color gemstones with a lifetime guarantee, so you can wear your Chatham jewelry as everyday elegance without worry.
Never Mined
We want you and the planet to feel beautiful. That's why we follow strict ethical and responsible gem growing practices. We also plant a tree for every jewelry piece sold.
Brilliantly Created
We combine advanced technology with extraordinary craftsmanship to ensure the highest quality lab grown gemstones and jewelry.
EXPLORE MORE COLLECTIONS
New Arrivals
Timeless Collection
Celestial Collection
Bar Collection
Sticks & Stones
spring/summer 2026
Top 5 Jewelry Trends
Explore how Chatham lab grown gemstones reimagine spring and summer's hottest trends with vivid color and responsible luxury.
Yes. Chatham lab-grown gemstones are grown in a laboratory using advanced scientific methods that replicate how gems form in nature. They have the same chemical composition, crystal structure, hardness, and optical properties as their mined counterparts. The only difference is origin: mined gems form underground versus lab-grown gems form aboveground.
How are Chatham gemstones grown?
Today, Chatham uses multiple advanced growth methods, including hydrothermal, flux, and a range of proprietary processes. These techniques are designed to closely replicate the natural geological conditions under which gemstones form. Growth occurs over a period of about 12 months resulting in exceptional quality gemstones.
Unlike faster mass-production growth methods that produce stones in a fraction of the time, Chatham's extended growth process prioritizes crystal integrity, depth of color, and natural formation characteristics. As a result, Chatham lab-grown gemstones develop more fully, much like it would in nature.
Why is Chatham the leader in lab-grown gemstones?
Chatham pioneered gemstone growth decades before lab-grown jewelry became mainstream. Today, Chatham remains the leader in lab-grown gemstones through an uncompromising commitment to quality, craftsmanship, and color mastery. We sacrifice nearly 80% of the original rough during cutting to reveal only the finest material. This ensures exceptional color saturation, clarity, and brilliance in every gemstone.
Combined with the industry's most extensive assortment of lab-grown gemstone colors—surpassing any other grower in range, consistency, and beauty—Chatham continues to set the benchmark for premium lab-grown color gemstones.
Does Chatham offer a warranty?
Yes, Chatham provides a lifetime guarantee on all lab-grown colored gemstones. Customers can trust that Chatham's lab-grown gems will retain their color and crystal structure permanently under normal wear. However, if your Chatham lab-grown color gemstone should chip or break under normal circumstances, Chatham will repair or replace it at no charge to the customer.
Chatham's commitment to quality through its lifetime warranty ensures peace of mind, trusted value, and reassurance that the gemstone marking the most meaningful moments will remain as vibrant and significant as the day it was chosen.
