By CIOInsider Team
 

Gold jewellery rarely consists of pure metal alone. It may contain copper, silver or other alloys for strength, while stones, lac, solder and fastenings add to gross weight. An ornament may also be plated, hollow, filled or represented as purer than it is. For a lender, that difference is central to risk. A gold loan is sanctioned against the recoverable value of eligible gold, not the retail price, sentimental value or appearance. If purity or net weight is overstated, the collateral may not cover the outstanding amount during default. Lenders therefore combine physical appraisal, standardised testing, conservative valuation and documentation before deciding how much credit may be offered.

Why Does Impure Gold Create a Lending Risk?

Purity determines how much fine gold an ornament contains. A 22-carat piece generally has more gold than an item of equal weight at 18 carats. The lower-purity item therefore supports a smaller valuation, even if both look similar. Adulteration is more serious when cheaper metal is concealed beneath a gold surface or filling increases weight without adding gold value.

The lender faces several connected risks:
● collateral value may be overstated at sanction;
● the permitted loan-to-value ratio may be breached;
● recovery through auction may produce a shortfall;
● disputes may arise over weight, purity or testing;
● repeated appraisal failures can weaken branch controls.

Not every low-purity ornament is fraudulent. Jewellery purity varies by age, region, craftsmanship and repair history. The task is to identify the actual gold content consistently, rather than judge the borrower’s intent without evidence.

How Do Lenders Test Purity and Detect Adulteration?

Appraisal usually begins with inspection and weighing. The valuer looks for hallmarks, joints, solder, stones, damage, plating and unusual density. A touchstone test may indicate purity by comparing a streak from the ornament with reference samples. Many lenders also use an X-ray fluorescence, or XRF, analyser, which estimates the elemental composition of the surface without significantly damaging it.

No single method is infallible. Surface tests may not reveal a different metal hidden inside a plated ornament. Depending on lender policy, suspicious items may be checked at several points, tested by another authorised valuer or declined. Density checks and examination of hollow sections can add context. A gold loan app may support parts of the customer journey, but purity assessment remains a controlled physical process at an authorised location.

How Does Purity Affect Valuation and the Sanctioned Amount?

After assaying, the lender calculates net gold weight by deducting stones, lac, strings, fastenings and other material. The remaining weight is adjusted for caratage and valued using the reference-price method under applicable RBI norms. Making charges, brand premiums and gemstone values aren’t included because they may not be recoverable through sale.

A gold loan calculator can provide a preliminary estimate, yet the final eligible amount depends on this branch-level appraisal. Lenders may also apply a loan-to-value ratio below the regulatory ceiling to absorb price movements or valuation uncertainty. If two ornaments weigh 30 grams but one has more stones and lower purity, their eligible values can differ substantially. That isn’t necessarily inconsistent pricing; it reflects the quantity of gold that can reasonably support the loan.

What Controls Protect the Lender and Borrower?

The RBI’s harmonised directions, applicable no later than April 1, 2026, require regulated lenders to use standardised assaying across branches. The borrower must be present during appraisal, and deductions for stones, fastenings and other materials should be explained. The lender must provide a certificate or e-certificate recording caratage, gross weight, net weight, deductions, defects, collateral image and assessed value, as per applicable norms.

Sound internal controls may also include:
●trained and authorised valuers;
●calibrated testing equipment and audit trails;
●dual checks for unusual or high-value ornaments;
●sealed packets linked to the appraisal record;
●periodic surprise verification of pledged collateral.

Risk can influence whether an item is accepted and how much is sanctioned, but the stated gold loan interest rate should still be read with all charges and repayment terms. Any rejection or deduction should be communicated clearly rather than left to assumption.

Conclusion

Impure gold doesn’t automatically make jewellery ineligible, since most ornaments contain alloys. The question is whether the lender can establish purity, net gold weight and recoverable value. Visual inspection, touchstone testing, XRF analysis, secondary checks and conservative LTV decisions work together to control that risk. Just as important, the appraisal record protects the borrower by documenting what was pledged and how it was valued. When testing is standardised and explanations are transparent, disagreements are less likely to emerge later. Careful assaying is not a minor branch formality. It is the foundation on which fair sanctioning, collateral security and responsible gold-backed lending depend.