Diamond Supplier in India
Wholesale Natural & Lab Grown Loose Diamonds for Mumbai, Surat, Delhi, Jaipur, Kolkata, Hyderabad & Chennai
Mann Gems LLP is a certified diamond supplier in India, trading natural diamonds and lab grown diamonds for jewelry manufacturers, wholesalers, and retailers nationwide. As a direct wholesale diamond supplier, we ship loose diamonds in bulk straight from our base at Bharat Diamond Bourse, every stone backed by GIA and IGI certification and 15+ years in the natural and lab grown diamond trade. Our catalogue spans certified natural diamonds, certified lab grown diamonds, loose diamonds by carat and shape, and all eleven commercially traded diamond shapes, so manufacturers sourcing wholesale diamonds in India can work with one supplier instead of several.
Diamond Supplier in India: Natural & Lab Grown Diamonds for Wholesale Buyers
We’re Mann Gems LLP, a certified diamond supplier in India that jewelry manufacturers actually deal with directly. We supply loose natural diamonds and lab grown diamonds, in all eleven shapes, in everything from melee to solitaire sizes. We’ve been working out of Bharat Diamond Bourse in Mumbai for over 15 years now, right where Surat’s cutters and graders actually do business, so when a diamond jewelry manufacturer or wholesaler in Jaipur, Delhi, Kolkata, Hyderabad, Chennai, or anywhere else calls us, they’re buying from a wholesale diamond supplier at source, not from someone who bought from someone who bought from the Bourse.
Every quote we give on wholesale diamonds in India is checked against where the market actually is that day, and every certified diamond is graded under GIA or IGI before it leaves our hands, whether it’s headed to Mumbai, Surat, Delhi, Jaipur, Kolkata, Hyderabad, Chennai, or your manufacturing unit wherever it happens to be. Tell us the carat range, shape mix, and certification tier you need and we’ll work from there. If it’s your first time sourcing as a jewelry manufacturer, we’ll walk you through pricing and realistic lead times before you commit to anything. If you’re already a regular manufacturer, you get first pick when stock is tight. And because the same people handle sourcing and dispatch here, every loose diamond parcel that reaches your production line matches what you were quoted, every single time.
Diamond Quality Standards
Every stone we supply, natural or lab grown, is checked against the 4Cs before it goes out to a buyer:
- Cut: how well the diamond handles light, which has the biggest effect on how it actually looks in the hand.
Color: the range from colorless through faint yellow, with colorless stones commanding the higher price.
Clarity: what’s visible inside and on the surface of the stone; fewer inclusions means a rarer, more valuable diamond.
Carat: the raw weight of the stone, where price increases faster than weight as size goes up.
We also check finish and symmetry on every parcel before it ships, so what you’re quoted is what actually arrives.
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What We Supply: Natural & Lab Grown Diamonds
We supply both natural diamonds and lab grown diamonds to jewelry manufacturers, wholesalers, and retailers across India, each one independently certified before it leaves our office. Here’s what’s available:
Natural Diamonds: Earth Mined Brilliance, Sourced at the Bourse
Natural diamonds take billions of years to form underground, and every stone we sell is graded on cut, color, clarity, and carat before it’s certified. For bridal and heirloom focused manufacturers across India, that origin story is still what the end customer is paying for.
Available to buyers in India:
Natural diamonds remain the preferred choice for China jewellery manufacturers producing bridal, investment, and heirloom-grade jewellery, where provenance and long-term value retention matter most to end customers.
Lab Grown Diamond Supplier in India
Lab grown diamonds are chemically and optically identical to natural stones. The only real difference is how they’re formed, using HPHT or CVD technology in a lab setting instead of underground pressure over millions of years. Demand for certified lab grown stock has picked up fast across India, mainly because it lets manufacturers hit a lower price point without giving up on grading standards. We supply:
- Round and fancy shape lab grown diamonds
- Certified lab grown diamonds with full grading documentation
- Rose cut and mix cut fancy lab grown diamonds
- Loupe clean and white lab grown diamond categories
- Solitaire grade certified lab grown diamonds
Loose Diamond Supplier in India
What we supply is unset, loose diamonds, nothing more. Manufacturers, designers, and wholesalers across India take it from there and set it under their own brand. We stay out of the finished jewelry side of the business entirely; we just supply what goes into it
Diamond Shapes Available in India
We cut and select parcels across all eleven commercially traded diamond shapes that manufacturers in India order for bridal jewelry, engagement rings, and fashion pieces.
ROUND
PRINCESS
CUSHION
OVAL
EMERALD
HEART
PEAR
MARQUISE
ASSCHER
RADIANT
ROSE
Certified Diamond Supply & Wholesale Services In India
Diamond sizes, certified supply, custom sourcing, wholesale terms, and secure delivery for jewelry businesses across India.
Stock spans melee sizes for pave and accent settings through solitaire grade centre stones. Carat availability is confirmed against live inventory at the time of enquiry, since market pricing shifts daily.
Every certified stone we supply carries a grading report with an independently verifiable report number. We supply diamonds certified by GIA (Gemological Institute of America) and IGI (International Gemological Institute), across both natural and lab grown categories.
- GIA (Gemological Institute of America): the industry benchmark for strict, consistent grading.
- IGI (International Gemological Institute): a leading lab for both natural and lab grown certification, widely used across the Indian trade.
Buyers in India with a specific production run in mind can request:
- Custom carat and size ranges matched to a manufacturing schedule
- A specific shape mix, whether round only, fancy only, or a blend
- Certification tier by lab (GIA or IGI) to match your market positioning
- Natural, lab grown, or a combined natural and lab grown parcel
Every custom request is checked against current stock and certification availability before we confirm it, so the order that’s placed is the order that ships.
We supply jewelry manufacturers, wholesalers, and retailers across the country, from established Surat and Mumbai trading houses to smaller manufacturers in other cities sourcing directly for the first time.
Bulk is the standard here, not the exception. We work in carat ranges, shape mixes, and certification tiers rather than one-off retail sales, and order size is set by what a manufacturer actually needs rather than a fixed minimum. Several of our buyers start with a trial parcel before moving to a regular running order.
Every shipment is packaged to protect the stones in transit and sent through insured domestic courier with tracking to Mumbai, Surat, Delhi, Jaipur, Kolkata, Hyderabad, Chennai, and every other city we serve. GST invoicing and HSN classification are provided with each shipment, and certification documentation travels with the parcel so it can be checked against every stone on arrival. We include a standard conflict-free sourcing statement with each shipment, in line with Kimberley Process requirements.
Natural diamonds and lab grown diamonds fall under separate HSN classifications for GST purposes in India, and GJEPC guidance requires that invoices clearly state whether a stone is natural or lab grown. Every lab grown diamond we supply is certified and billed as lab grown from the start, so that classification is already built into your paperwork before the stone reaches you.
City | City Code (STD) | We Supply |
Diamond Supplier in Mumbai | 022 | Natural Diamonds, Lab Grown, Loose Diamonds |
Diamond Supplier in Surat | 0261 | Natural Diamonds, Lab Grown, Loose Diamonds |
Diamond Supplier in Delhi | 011 | Natural Diamonds, Lab Grown, Loose Diamonds |
Diamond Supplier in Jaipur | 0141 | Natural Diamonds, Lab Grown, Loose Diamonds |
Diamond Supplier in Kolkata | 033 | Natural Diamonds, Lab Grown, Loose Diamonds |
Diamond Supplier in Hyderabad | 040 | Natural Diamonds, Lab Grown, Loose Diamonds |
Diamond Supplier in Chennai | 044 | Natural Diamonds, Lab Grown, Loose Diamonds |
Why Choose Mann Gems LLP
Manufacturers and wholesalers across India work with Mann Gems LLP for the same reason buyers everywhere do: a direct, certified supply chain with no reseller markup sitting between them and the stone.
- 15+ years of experience in the natural and lab grown diamond trade, established in 2005.
- GIA and IGI certified diamonds on every stone, independently graded before it ships.
- Trusted by 1,000+ clients globally, built on repeat orders rather than one-off sales.
- Ethically sourced diamonds aligned with Kimberley Process standards.
- Both natural and lab grown supply from one relationship, so manufacturers aren't managing two separate vendors for two categories.
Send Your Diamond
Requirements
Our sourcing team responds within 4 business hours with a curated certified stone list and pricing. All inquiries are strictly confidential.
Natural Diamonds vs Lab Grown Diamonds: Quick Comparison
| Factor | Natural Diamonds | Lab Grown Diamonds |
|---|---|---|
| Origin | Formed naturally in the earth’s mantle over billions of years | Created in a controlled lab using HPHT or CVD technology |
| Composition | Pure carbon crystal structure | Identical carbon crystal structure |
| Certification | GIA, IGI | IGI |
| Typical Price Point | Higher, driven by rarity | Generally more accessible per carat |
| Resale Value | Higher and more stable long-term | Lower and more variable |
| Common India Buyer | Bridal, heirloom, investment-focused retailers | Fashion, volume, value-focused retail chains |
Find Your Perfect Diamond Parcel
Talk to our India desk today. We get back to you within one business hour.
Frequently Asked Questions: Wholesale Diamond Suppliers in India
Mann Gems LLP supplies GIA and IGI certified natural and lab grown loose diamonds directly from Bharat Diamond Bourse, so buyers deal with us at source instead of through a chain of local resellers.
We currently supply GIA and IGI certified diamonds, the two most widely recognized labs across the Indian trade for both natural and lab grown stones. We don’t offer HRD or SGL certification at this time.
No. We supply lab grown diamonds, which share the same carbon structure and optical properties as natural diamonds. Moissanite is a different mineral (silicon carbide) with different optical and physical properties, and we don’t supply it.
Yes. Natural diamonds and lab grown diamonds are classified under separate HSN codes for GST purposes, and every invoice we issue clearly states which category the stone falls under, so that classification is already sorted before the stone reaches you.
Yes, buyers are welcome to visit our office at Bharat Diamond Bourse by appointment to view parcels in person before placing an order.
There’s no fixed minimum. We supply single solitaires for custom orders and larger parcels for manufacturers running production.
Yes, in round, fancy shape, rose cut, mix cut, and solitaire inventory, across both natural and CVD or HPHT lab grown categories.
You share your carat, shape, and certification requirements, we match it against current stock, confirm grading and live market pricing, and ship it out with insurance and GST invoicing once the order is confirmed.
Yes. We send HD video, 360 degree views, and certificate scans over WhatsApp or email, and can set up a live video call if you’d like one.