- Home
- Nveloop GemHub
The B2B gemstone marketplace & catalog for certified loose gems & diamonds
Source certified sapphires, rubies, emeralds, spinel and GIA-graded diamonds directly from verified suppliers — or list your own stock in front of trade buyers worldwide. Discover. Match. Trade.
For buyers and suppliers · No online payment, deal direct · Worldwide trade
A marketplace where the gem trade can see what it is buying
Sourcing coloured stones usually means a chain of phone calls, chat photos and PDFs. Nveloop GemHub puts that stock in one searchable catalog: sapphire, ruby, emerald, spinel, Paraiba, GIA-graded diamonds and parcels, each with its laboratory report, treatment disclosure and price per carat.
It is built by the team that has written software for the stone trade since 2016, so the filters, the vocabulary and the order flow follow how gem dealers actually work — not a generic shop template with gemstone words added.
- Loose gemstones, diamonds, and parcels & lots in one catalog
- Filter by variety, shape, carat, colour, treatment, clarity, origin and laboratory
- Compare stones on price per carat, not only the total
- Unheated, GRS-certified, GIA diamonds and matched pairs in one click
- No online payment — you deal with the supplier directly
For buyers who source stones, and suppliers who sell them
For trade buyers
Jewellery houses, retailers, manufacturers and exporters get one place to find certified stones from many suppliers, with the information needed to decide before the first message is sent.
- Search certified stock from verified suppliers
- Treatment and laboratory report on every listing
- Mix stones from several suppliers in a single order
- Save stones to a wishlist and reorder from past orders
- See prices in your own trade currency
- Sign in with WhatsApp, Google or Apple
For suppliers
Traders, lapidaries and mine-direct sellers get a professional storefront in front of international buyers, with control over exactly who sees which stones and at what price.
- Your own supplier storefront and company profile
- Upload stones with photos, video, 360° views and certificate PDFs
- Public stock, or stock visible only to buyers you connect with
- Orders arrive split by supplier, with a status for each one
- Insights on what buyers view and search for
- WhatsApp and email notifications for new orders
A catalog designed for gemstones, on desktop and phone
These are real screens from Nveloop GemHub, shown with demonstration stock.
The whole catalog works on a phone
Buyers and suppliers are often travelling, at a trade show or in a market. Search, filters, the currency picker, wishlist and order basket all work on a phone screen, and a filter drawer keeps the stone list clear.
- Filters open in a drawer on small screens
- Switch currency from the header on any page
- Save stones to a wishlist and build an order on the go
- Enquire about a stone on WhatsApp straight from its page
Built around how gemstones are really bought
Verified reports, not claims
Report numbers are checked against the issuing laboratory before a stone is published, so the certificate on the page is the one that exists.
Full treatment disclosure
Heated, unheated, diffused or oiled — treatment is always stated, and you can filter for unheated stones in a single click.
Per-carat pricing
Every stone shows its total and its price per carat, so a 2 ct and a 6 ct stone can be compared on the same footing.
One order, many suppliers
A sapphire from one supplier, a pair of rubies from another and a certified diamond from a third go into one order, grouped by supplier with a subtotal each.
Photo, video and 360°
Colour and life are judged by eye. Stones can carry multiple photographs, video and a drag-to-rotate 360° view.
Your currency
Prices are held in US dollars and can be shown in the trade currency you work in, with every price on the site converting at once.
From search to supplier invoice in four steps
Find your stones
Filter by variety, carat, colour, shape, treatment, clarity, origin and laboratory.
Build your order
Add stones from as many suppliers as you need. The order stays grouped by supplier.
Submit it
Enter your company and delivery details. You receive an order reference straight away.
Each supplier confirms and invoices
No online payment. Every supplier responds directly, and you follow each one’s progress in My orders.
Questions buyers ask first
Is the stone really what the listing says? Is it treated? What does it cost per carat? Who is selling it, and can they ship to me? GemHub answers each of those on the stone page, before you contact anyone.
- Laboratory report and report number
- Treatment, clarity, origin and dimensions
- Supplier profile, location and verification
- Enquire on WhatsApp straight from the listing
Reach buyers in every trade centre, on your terms
Your stones, your prices, your visibility rules. GemHub gives gem traders, lapidaries and miners a supplier panel that is built around the way the trade sells — part public, part private.
- Verified supplier profile with a storefront page of your own
- Upload photos, video, 360° spins and certificate PDFs
- Decide per stone who can see it and whether the price is shown
- Connect trusted buyers, build buyer groups and send invitation links
- Buyers can request access to the stock you keep private
- See what buyers search for and view with supplier Insights
- Each supplier sees only their own stones, buyers and orders
Gemstones are traded across borders, so GemHub is international from the start: stock priced in US dollars, shown in the buyer’s trade currency, with origins listed from Africa, Asia and beyond.
Built for the world’s gemstone trading centres
Coloured stones are mined in one country, cut in another and sold in a third. GemHub gives buyers and suppliers in every one of those places the same catalog, the same reports and the same order flow.
Bangkok & Chanthaburi
Thailand is one of the busiest markets in the world for cutting, treating and trading sapphire and ruby. Thai dealers can show certified stock to overseas buyers before a single parcel goes out on memo.
Hong Kong & China
Hong Kong hosts some of the largest international jewellery and gem fairs and is the gateway to buyers in mainland China. Buyers can keep sourcing between shows, with the report and treatment of every stone in view.
Dubai & the UAE
Dubai sits between the gem markets of Asia, Africa and Europe. Stock is priced in US dollars and each buyer can view prices in the trade currency they work in.
Sri Lanka
Ratnapura, Beruwala and Colombo are home to Ceylon blue sapphire, padparadscha and much more. Nveloop is Sri Lankan, and GemHub was designed around the way Sri Lankan dealers hold, show and sell stones.
Jaipur & India
Jaipur is one of the great cutting centres for emerald and other coloured stones. Cutters and dealers can list calibrated goods, pairs and parcels alongside single certified stones.
Europe
From the diamond trade of Antwerp and the cutters of Idar-Oberstein to the high-jewellery houses of Geneva and Paris, European buyers expect laboratory reports and full disclosure on every stone.
United States
New York’s jewellery district and the Tucson gem shows every February bring buyers who compare per-carat prices and lab reports across many suppliers — exactly how the GemHub catalog is laid out.
East Africa & Madagascar
Tanzania, Mozambique, Kenya and Madagascar supply sapphire, ruby, spinel, tanzanite and tourmaline. Mine-direct suppliers can reach international buyers with fewer hands between the mine and the setting.
The stones buyers look for most
Looking to run your own website or inventory instead? See the gem & jewelry e-commerce websites and the Gem Merchant System for gemstone traders.
What is Nveloop GemHub?
Nveloop GemHub is a B2B marketplace for certified loose gemstones, diamonds and parcels. Trade buyers — jewellery houses, retailers and exporters — search stock from verified suppliers, build one order across as many suppliers as they like, and submit it. Suppliers are traders, lapidaries and mine-direct sellers who list their own stock on their own terms.
Do I pay through GemHub?
No. There is no online payment. You build an order and submit it, and each supplier confirms it and invoices you directly. That keeps payment terms, shipping terms and inspection windows between you and the person who owns the stone.
How do you handle laboratory reports and treatments?
Every listing shows its variety, weight, colour, origin, treatment and laboratory report. Report numbers are checked against the issuing laboratory before a stone is published, and treatment is stated on the listing — so you can filter for unheated stones in one click rather than reading descriptions.
Can a supplier keep some stones private?
Yes. Suppliers choose who sees each stone and whether the price is shown. Stones can be public, or visible only to buyers the supplier has connected with, through groups and invitation links. A buyer who sees a supplier's public stock can request access to the rest.
Who is allowed to list stones?
Suppliers are onboarded by the Nveloop team. Each supplier completes a company profile and uploads documents such as a trade licence and tax certificate, which our team reviews. Verified suppliers publish straight away; stones from suppliers not yet verified go through a review queue first.
Which currencies and languages does it support?
Stones are priced in US dollars, and buyers can switch the whole catalog to another trade currency from the header — every price on the site converts instantly. The interface is in English. Buyers sign in with a WhatsApp one-time code or with Google or Apple.
How do I list my stock on GemHub?
Talk to us. Tell us what you trade and where you are based and we will set up your supplier account and storefront, walk you through uploading stones with photographs, video, 360° views and certificates, and help you decide who should see what.
Can buyers and suppliers outside Sri Lanka use GemHub?
Yes. GemHub is built for international trade. Buyers can be anywhere in the world, and suppliers set their own trade terms — minimum order, payment terms, shipping terms (Incoterms) and inspection window — which are shown to buyers before they order.
Is GemHub a gem catalog for my own stock?
Yes. Every supplier gets a storefront page with its own catalog of stones, company profile and verification. You decide per stone whether it is public or visible only to buyers you invite, so the same catalog works for open selling and for private clients.
How is GemHub different from the Gem Merchant System?
The Gem Merchant System is the software a gem business uses internally to buy, cut, certify, consign and invoice its stock. GemHub is the marketplace where stock is shown to trade buyers and ordered. Many businesses need one or the other; some use both.
Put your stock in front of the world’s buyers
Book a free 30-minute call. Tell us what you trade and we will show you how GemHub would list it, who could see it, and how orders would reach you.
Usually replied to within one business day · Sessions run in English · Sri Lanka & USA offices