【Tokyo, Japan】As Gold Prices Soar, ‘Lab-Grown Diamonds’ Gain Popularity as Affordable Jewelry… Higher Purity Than Natural, No Difference in Brilliance, Price About 1/15th

Editor’s Note

As gold prices soar to unprecedented levels, consumers are increasingly turning to lab-grown diamonds as a cost-effective alternative for jewelry. This shift highlights changing preferences in the luxury market, where affordability and sustainability are gaining prominence.

Affordable Jewelry Trend Amid High Gold Prices

The price of gold continues to hit record highs, while the popularity of “lab-grown diamonds” is rising as affordable jewelry.

A Visit to a Ginza Jewelry Store

On the 13th, “It!” visited a jewelry store in Ginza, Tokyo. The store was lined with diamond accessories such as rings and necklaces. All of these were “lab-grown diamonds.” Looking at the prices, there were very affordable items in the 40,000 to 50,000 yen range.

“I still prefer diamonds. I heard they have the same composition as natural diamonds, so I can use them for everyday wear without worry, which is good.”
Growing Sales at a Specialized Store

“SHINCA Ginza,” which opened seven years ago as a “lab-grown diamond specialty store,” says that sales have been increasing along with rising awareness in recent years.

“With gold prices soaring and jewelry becoming increasingly out of reach, young people find it very affordable, so many buy it for themselves or as gifts as very accessible jewelry.” – Miyuki Fujii, SHINCA Ginza
Market Dynamics: Gold vs. Diamonds

On the 13th, the price of gold exceeded 25,900 yen per gram, reaching a record high. While it has soared to about three times its price three years ago, price movements at international diamond exchanges have been declining. The spread of lab-grown diamonds in the market is seen as a major factor pushing down prices.
It is said that a necklace costing about 100,000 yen adorned with a 0.2-carat diamond is particularly popular among younger generations.

The Technology Behind Lab-Grown Diamonds

The popularity of “lab-grown diamonds” is spreading across a wide range of age groups. We visited “EF DIAMOND,” a company that provides the manufacturing technology. When asked about the difference between natural and lab-grown diamonds, Masanori Sunose, CEO of EF DIAMOND, replied:

“Lab-grown diamonds are completely identical in physical and chemical composition to natural diamonds.”

It is said that natural diamonds take over 100 million years to form, but…

“For about 1 carat, it takes a few weeks. The time scale is different, taking from a few weeks to a few months. It’s a dramatically accelerated process. The brilliance is even more beautiful than natural diamonds.” – Masanori Sunose, CEO, EF DIAMOND

Lab-grown diamonds also have higher purity and shine just as brilliantly as natural ones without any inferiority.
Moreover, the price is surprising. While a high-quality natural diamond of 1 carat costs about 1 million yen, a lab-grown one…

“A year ago, it was about 100,000 yen, but now it’s about 60,000 yen including tax (per carat). Despite the weak yen, it’s become very cheap, about 1/15th (of natural). If we can set a price that is more accessible to younger generations, everyone will be happy. Our goal is to reduce manufacturing costs to lower the price.” – Masanori Sunose, CEO, EF DIAMOND
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⏰ Published on: January 13, 2026