Known Sources
We source from selected lab-grown diamond makers in India and established wholesale partners in the US rather than buying anonymously from an unknown chain.
RESPONSIBLE SOURCING
Know Where It Comes From.Know Who Checked It.
Responsible sourcing begins with visibility. We work with selected lab-grown diamond makers and wholesale partners, review every stone we choose, and use experienced jewelry workshops according to the needs of each design. Our aim is simple: fewer unknowns between the source and you.
Diamond-by-Diamond QC
A grading report is only one part of the decision. We also inspect the diamond itself for appearance, proportions, finish and overall suitability before it is approved for a piece.
Experienced Workshops
Jewelry is produced through specialist workshops in Hong Kong, India or Los Angeles depending on the design. Our Hong Kong production partner brings more than 30 years of fine-jewelry manufacturing experience for luxury brands.
Information You Can Ask For
We believe sourcing should be explainable. If you want more information about a diamond, its grading report or how your piece will be made, ask us before you order.
THE JOURNEY
From Source to Your Jewelry Box
Our supply chain is intentionally straightforward. We source, inspect, make and quality-check each piece before it reaches you.
SOURCE
Diamond Makers & Wholesale Partners
We buy directly from selected lab-grown diamond makers in India and the US.
VERIFY
QC Inspect Every Selected Diamond
We review the grading information and inspect the actual stone for visual performance, proportions, finish and suitability for the setting.
MAKE
Specialist Jewelry Workshops
Your piece is made in the workshop best suited to the design and production requirements: Hong Kong, India or Los Angeles.
FINAL QC
Finished Piece Checked Again
Once the jewelry is complete, the finished piece is checked before dispatch so the stone, setting and finish meet the approved specification.
TO YOU
Delivered to the Customer
Your jewelry is securely packed and dispatched with order and tracking information so you can follow the final stage of its journey.
INDIA / US SOURCE
→
DIAMOND QC
→
HK / INDIA / LA WORKSHOP
→
FINAL QC
→
CUSTOMER
BEYOND THE REPORT
Why We Still Inspect the Diamond
Grading information is important, but two diamonds with similar specifications can still look different in person. Our selection process therefore combines documentation with a visual quality check.
01
Report Matching
We review the available grading information and confirm that the selected stone corresponds to the diamond being supplied.
02
Cut & Proportion
We consider the proportions and overall face-up appearance rather than choosing solely from a specification table.
03
Visual Appearance
We look at the diamond itself for characteristics that may affect how attractive it appears when viewed normally.
04
Setting Suitability
The diamond is considered in relation to the intended jewelry design, including shape, dimensions and how it will sit in the setting.
WHERE YOUR JEWELRY IS MADE
The Right Workshop for the Right Piece
We do not believe every design has to be made in the same place. Production is assigned according to the type of piece, technical requirements and the strengths of the workshop.
HONG KONG
30+ Years of Fine-Jewelry Expertise
Our Hong Kong production partner brings more than 30 years of fine-jewelry manufacturing experience for luxury brands.
It is particularly valuable for development, custom work and pieces requiring close communication with our Hong Kong team.
INDIA
Close to the Diamond Supply Chain
India is an important center for diamond cutting, polishing and jewelry manufacturing. Selected pieces can be produced close to the source of the diamonds where the required capability is available.
LOS ANGELES
US Production When It Makes Sense
For selected designs or production requirements, we can work with specialist jewelry production in Los Angeles, allowing flexibility for US-focused pieces and projects.
OUR SOURCING STANDARDS
What Responsible Sourcing Means to Us
We take inspiration from the strongest practices in modern lab-grown diamond retail: clear origin disclosure, supplier accountability, independent grading where applicable, transparent claims and documented quality control.
Disclose Lab-Grown Origin
We clearly identify our laboratory-grown diamonds as lab-grown. We do not present them as mined or natural diamonds.
Use Independent Reports Where Applicable
Certified stones are supplied with the relevant independent grading information so important diamond characteristics are documented.
Work With Accountable Suppliers
We prefer partners who can provide clear product information and who are prepared to answer questions about the diamonds they supply.
Inspect Before We Approve
We do not rely only on a supplier listing. The selected diamond is reviewed before it is approved for your piece.
Avoid Vague Ethical Claims
Rather than calling every lab-grown diamond automatically “ethical” or “sustainable,” we explain what we can actually verify about our own sourcing process.
Keep Improving the Chain
Responsible sourcing is an ongoing process. As better supplier information and standards become available, we aim to make our own sourcing requirements more specific.
TRANSPARENCY
Traceability Is About Reducing the Unknowns
No jewelry supply chain is completely simple. Diamonds can be grown, cut, graded, distributed, set and finished by different specialists. Our approach is to keep the chain as understandable as possible and to know who we are buying from and who is making the piece.
If a customer wants to understand the origin of a particular diamond or where a custom piece will be produced, we encourage that conversation before the order is placed.
ASK ABOUT A DIAMONDCLEAR LANGUAGE
Transparency Also Means Knowing What Not to Claim
WE PREFER
Specific, Explainable Information
Lab-grown origin. Known supplier route. Independent report where applicable. Diamond QC. Known production workshop.
WE AVOID
Blanket “100% Ethical” Claims
Complex global supply chains cannot be meaningfully explained by a single broad label without evidence behind it.
WE AVOID
Assuming Every Lab-Grown Diamond Is Equal
Source, manufacturing, grading and visual quality can vary. That is one reason our own selection and QC process matters.
CERTIFICATION & GRADING
Documentation Supports the Story
For certified diamonds, the independent grading report provides a documented description of the stone and identifies its laboratory-grown origin. We use that report together with our own inspection rather than treating certification as a substitute for looking at the diamond.
THE BIGGER PICTURE
Sourcing Is One Part of Responsibility
Responsible sourcing and sustainability overlap, but they are not the same thing. Our sustainability approach also considers made-to-order production, longevity, honest environmental communication and aftercare.
READ OUR SUSTAINABILITY APPROACHRESPONSIBLE SOURCING FAQ
Good to Know
Where do Efi & Co's lab-grown diamonds come from?
We source from selected laboratory-grown diamond makers in India and
established wholesale partners in the US. The exact route can vary
depending on the diamond specification and availability.
Do you inspect every diamond?
Every diamond selected for an Efi & Co piece is reviewed as part
of our QC process. We consider the available grading information as
well as the actual appearance and suitability of the stone.
Where is Efi & Co jewelry made?
Depending on the design and production requirements, pieces may be
produced through specialist jewelry workshops in Hong Kong, India
or Los Angeles. Our Hong Kong production partner has more than 30
years of fine-jewelry manufacturing experience for luxury brands.
Are your lab-grown diamonds certified?
Certified diamonds are supplied with the relevant independent grading
information. Availability and report type can depend on the individual
diamond, so check the product or diamond details for the specific stone.
Does lab-grown automatically mean ethically sourced?
We do not make that blanket claim. Laboratory-grown diamonds avoid
diamond mining, but their wider supply chain still involves energy,
manufacturing, labor and materials. Our responsible-sourcing approach
focuses on known suppliers, clear information and quality control.
Can I ask where my specific ring will be made?
Yes. If the production location matters to you, contact us before
ordering and we can discuss the planned workshop for your design.
Can I request more information about a diamond before buying?
Yes. Contact us with the diamond or product you are considering.
Where information is available, we can help you review the grading
details and answer sourcing questions before you make your decision.
ASK BEFORE YOU BUY
Want to Know More About Your Diamond?
Send us the diamond, ring or specification you are considering. We are happy to explain the available grading information, sourcing route and production process before you order.
CERTIFIED DIAMONDS
FREE WORLDWIDE EXPRESS SHIPPING
WARRANTY INCLUDED
FREE CUSTOMISATION
TRANSPARENT PRICING