What banks actually check before financing a Surat diamond cutting & polishing unit

Walk into a bank branch in Mahidharpura or Varachha with a diamond cutting and polishing unit's loan file, and the credit officer's first real question is rarely about your machinery or your GST returns. It is some version of: what exactly is sitting in your safe, and how do I know what it is worth? Roughly nine out of every ten diamonds cut and polished anywhere in the world pass through Surat's units, yet the industry runs on a financing problem few other trades in this city face as sharply — the single biggest asset on a diamond unit's balance sheet, its rough and polished stock, is also the one asset a bank's own officer cannot independently verify.

That problem shapes almost everything else in a diamond unit's loan file: how much collateral gets asked for beyond the stock itself, which export-credit facilities you can actually access, and — since the lab-grown diamond price collapse of the last two years — how differently a bank now reads the same stock statement it accepted without question a few years ago. This article sets out what a bank actually checks, in the order it usually checks it.

Why your stock isn't like other collateral

A trading firm's finished-goods stock, or a powerloom unit's grey fabric, has an observable market price a bank can cross-check in a day. A parcel of polished diamonds does not work that way: cut, clarity, colour and carat interact in ways only a trained gemologist can assess, and even two certified stones of similar specification can sell for meaningfully different prices depending on make and market timing. A bank's credit officer is simply not equipped to grade what is hypothecated to the bank, and knows it.

The practical result is that stock hypothecation on a diamond unit's cash-credit account is treated as necessary but rarely sufficient. Banks lean on GIA- or IGI-certified valuations for anything claimed at meaningful value, appoint an empanelled valuer or stock auditor to physically verify lots at each renewal, and — this is the part that surprises many owners — still ask for tangible collateral (a factory shed, a residential property, a fixed deposit) on top of an otherwise well-documented, fully hypothecated stock position. A Mahidharpura unit with ₹5 crore of hypothecated polished stock on its books and a clean repayment record can still be asked to mortgage a flat for a ₹3 crore cash-credit limit — not because the bank doubts the owner, but because it cannot independently price what it is lending against.

Export credit runs on rules you must actually meet

Most Surat diamond units sell into the export market, which opens access to RBI's concessional export-credit framework — packing credit before shipment, and credit against export bills after — but only if specific conditions are met. Packing credit must be adjusted through actual export documents within 360 days of the advance; run past that window and the advance stops qualifying for the concessional rate from the start, not just going forward. On top of that, gem and jewellery exporters have historically been required to show a minimum three-year track record in the trade before a bank extends this facility — verified as of September 2026, confirm your bank's current internal criteria before applying.

Before any of that, a diamond exporter needs two registrations a domestic-only unit does not: a live GJEPC Registration-cum-Membership Certificate (RCMC), without which export benefits under the trade policy are not available at all, and a valid Import Export Code (IEC). A unit importing rough diamonds also needs a valid Kimberley Process certificate for each import consignment — banks financing rough-diamond purchase will ask to see it as part of the same file. A new unit that is, say, eighteen months old and has not yet built the three-year track record is not shut out of financing altogether; it can still borrow against its stock the way a domestic-only unit does, just without the concessional export-credit rate until the track record is in place.

A bank does not finance "diamonds." It finances your ability to prove, quarter after quarter, that the stone sitting in your hypothecated stock is worth what your stock statement says it is.

The lab-grown price shock changed how banks read your stock

Since 2020, lab-grown diamond (LGD) prices have collapsed — a one-carat LGD stone that traded near $3,400 in 2020 now trades at roughly $750–1,000, a fall of about 65–74%, driven by rapidly expanding supply. Natural diamond prices have also softened over the same period, though far less sharply. The effect on India's diamond trade shows up directly in export data: cut-and-polished diamond exports fell to a 19-year low of $13.3 billion in FY2024-25, then slipped a further 8.52% to $12.16 billion in FY2025-26 — still the largest single category in India's gem and jewellery export basket, at 43.9% of the total, but a shrinking one.

For a bank, this is not a one-quarter news story to wait out; it is a structural change in what the collateral behind a diamond unit's cash-credit account is actually worth. Most banks now apply a steeper margin (in effect, a bigger haircut) on the lab-grown share of hypothecated stock than on natural, certified stock, and increasingly ask units to maintain lot-wise stock records that separate the two categories with GIA or IGI certification attached. A Katargam unit that declared 30% of its book-value stock as lab-grown at its last renewal, with a clean repayment history and no default, still saw its overall limit reduced once the bank revalued that share downward — the risk sat in the asset class, not in the borrower's conduct. If a meaningful share of your stock is lab-grown, expect this conversation at your next renewal even if nothing else about your file has changed.

Banking conduct — cash discipline is now part of the file

Every loan file gets bank statements read for cheque returns and limit utilisation. A diamond unit's file gets one layer more: how its cash dealings look against the trade's own compliance rules. Dealers in precious stones are covered under the Prevention of Money Laundering Act as persons carrying on a "designated business," and cash transactions of ₹10 lakh or more with a single customer — in one operation or several linked ones — trigger a reporting obligation to the Financial Intelligence Unit — verified as of September 2026, confirm the current threshold before relying on it. A bank's KYC and credit teams read unusual cash movement in a diamond unit's current account against exactly this backdrop: a pattern that looks like routine trade turnover to the owner can read as a compliance red flag to a credit officer who has seen this sector's cash-transaction history come under regulatory scrutiny before.

The document checklist that is actually sector-specific

Beyond the standard MSME set — Udyam registration, GST returns, CMA data, audited financials — a diamond unit's file is judged on documents most other trades never need to produce:

• A live GJEPC RCMC and valid IEC, renewed and on file before you apply for export credit.
• Kimberley Process certificates for any rough-diamond import lots financed against.
• GIA/IGI certification records for polished stock claimed at meaningful value in the stock statement.
• A lot-wise stock register that separates natural and lab-grown inventory, not a single blended stock figure.
• Export debtors' ageing, since post-shipment credit cycles here often run longer than a typical trading firm's.
• A forward-contract or hedging policy for the unit's dollar invoicing exposure, since export sales are in USD while costs are largely in rupees.

Sources

This article is general information, not professional advice. Rules change; verify current provisions or contact the office for advice on your situation.