Puremark – Mark of Purity
Sishu International sells its own branded diamonds with PUREMARK™ encrypted in it.
PUREMARK™ is a hallmark of Sishu International diamonds, signifying that the polished diamond is of high quality and standard. PUREMARK™ Diamonds are guaranteed to be Lab Grown and grown in state of the art laboratory setting.
PUREMARK™ ensures strict standards for quality and cut which gives peace of mind to the customers. PUREMARK™ represents your prosperity and longevity. PUREMARK™ can also be found on other products of Sishu International Pvt. Ltd. We are the first ever Lab Grown Diamond Manufacturing Company to own this kind of proposition in the world.


PUREMARK™ helps to identify that Sishu International handled high value premium diamonds. We strongly believe in using ecological processes to enhance the value of the diamonds and create a valuable proposition to our clients and stakeholders.
At PUREMARK™, You also get the benefits of getting a paired diamond which are grown and produced at the same time.
Diamond Grading System
Every Lab Grown diamond is unique. Each reflects the story of its arduous journey from laboratory reactors to a cherished object of adornment. Yet all diamonds share certain features that allow us to compare and evaluate them. Every Lab Grown Diamond has the same physical, chemical and optical properties of a mined diamond. A diamond’s is classified based on the characteristics known as the “4 C’s”. Clarity, Color and Cut (proportion) are the quality elements which together with the Carat Weight determine the value of a stone. In an attempt to classify each & every stone’s characteristics as best is possible Sishu International grades the diamond with following parameters.

What is Puremark?
PUREMARK™ is a Sishu International hallmark, signifying that the polished diamond is of high quality and standard. PUREMARK™ Diamonds are guaranteed to be Lab Grown and grown in state of the art laboratory setting. PUREMARK™ ensures strict standards for quality and cut which gives peace of mind to the customers.
PUREMARK™ represents your prosperity and longevity. PUREMARK™ can also be found on other products of Sishu International Pvt. Ltd. We are the first ever Diamond Manufacturing company to own this kind of proposition in the world.
PUREMARK™ helps to identify Sishu International handled high value premium diamonds.

PUREMARK’s 5 Petals
- Ecological
- Economical
- Employment
- Ethical
- Education
Puremark’s 5 Petals
Ecological
Lab Grown Diamonds are produced by a technology driven, CVD process, in the most ecological way without any harm to the environment. “PURE MARKTM ” is the symbol of ecologically produced diamond with Zero carbon foot-print.
Economical
Lab Grown Diamonds are manufactured by CVD process which is economical, by 30-40% compared to its natural counterparts, encouraging healthy competition in the industry.
Employment
We strive to create direct and indirect employment opportunities thereby, enhancing the quality of social life.
Ethical
Lab Grown Diamonds are manufactured in the state of the art facilities and are ethical, with no human rights violation.
Education
The CVD and HPHT technology pushes the limit of innovation by continuous improvement in the quality of product through R & D.