Brand Story

This brilliance astonished us.

A lovely and pure beauty made possible by the crystallization of research and technology.


"We would like people to enjoy this 'new diamond jewelry'."

This strong desire was how SHINCA began.

Laboratory grown diamond

The greatest brilliance of diamonds created by nature has fascinated us throughout the ages.

And in modern times, impressive advancements in technology have led to the creation of new diamonds.

And this is precisely what Laboratory grown diamonds(synthetic diamonds) are.


Authentic brilliance


With the only difference between the conditions under which they are created, Laboratory grown diamonds possess exactly the same elements and characteristics as natural diamonds and are nothing like imitations or simulants such as cubic zirconia. The 2 methods by which they are produced in cutting-edge labs and manufacturing bases are HPHT (High Pressure, High Temperature) and CVD (Chemical Vapor Deposition). In other words, it has become possible to reproduce the authentic brilliance of diamonds above ground.


Sustainability into the future


The process of creating Laboratory grown diamonds is gentle on the environment and superior in terms of social harmony. It is also a sustainable production method which will allow a stable supply for the next generation, contributing to growth in the future.



OUR QUALITY

SHINCA carefully selects materials for its jewelry to ensure users can enjoy it for many years of daily use.


Commitment to materials


SHINCA uses platinum or K18 (18 karat gold) as jewellery making material.

Gold and platinum with high purity are less likely to cause allergic reactions, but those with concerns about allergies are recommended to consult with a dermatologist for a "patch test".


K18 gold (18 karat gold)

Compared to K10 (10 karat gold), K18 is highly pure and therefore is resistant against discoloration.

Pure gold combined with copper results in pink gold.

It is gentle on the skin and gives a gorgeous impression.



In pursuit of radiance

At SHINCA we pursue brilliance in all of the Laboratory grown diamonds (synthetic diamonds) used in our jewelry collection.


Laboratory grown diamonds

Just like natural diamonds, Laboratory grown diamonds each feature their own unique characteristics, and no two of them are identical.

At SHINCA we follow especially strict standards to use only high-quality Laboratory grown diamonds.

Our company's highly experienced professionals oversee our entire collection.



At SHINCA we use Laboratory grown diamonds that conform to the following.


[Colorless Laboratory grown diamonds]

For 0.50ct and higher we only use stones which have cleared the I SI2 Excellent standard. Appraisal Reports from institutions such as DAIMOND FOUNDRY Inc., International Gemological Institute (IGI), and HRD are included.

Stones below 0.50ct do not include appraisal reports, but we use stones which conform with the I SI Very good class.


[Colored Laboratory grown diamonds]

For 0.30ct and higher we only use stones which have cleared the Fancy Color SI class standard. Appraisal reports from institutions such as DAIMOND FOUNDRY Inc., International Gemological Institute (IGI), and HRD are included.

Stones below 0.30ct do not include appraisal reports, but we use stones which conform with the Fancy SI class.


DIAMOND FOUNDRY Grading Report (Appraisal Report)

DIAMOND FOUNDRY guarantees the contents of this appraisal report.

DIAMOND FOUNDRY is a company based in San Francisco, California in America that manufactures and sells Laboratory grown diamonds.

At the stage of their founding in 2012 they received capital from many famous investors, one of whom was a famous Hollywood star.



IGI (International Gemological Institute) Grading Report (Appraisal Report)


HRD Grading Report (Appraisal Report)

Hoge Raad voor Diamant (HRD), located in Antwerp, Belgium, is the world's largest diamond research institute and is operated by the Antwerp World Diamond Center.

One of the most trusted diamond appraisal organizations in the world, they are known for their efforts in diamond grading and the development of appraisal equipment.