Delhi Gold TestingAGL Laboratory
Scientific Precision & Purity Certification

Silver Purity
& Testing Laboratory

Employing high-frequency X-Ray Fluorescence (XRF) and traditional chemical Fire Assay techniques to certify the molecular integrity of your silver assets. As the leading silver testing laboratory in Delhi, we verify purity levels up to 99.99% accuracy at our Rohini center.

Start AnalysisView Standards
Macro shot of a pure silver bar under bright clinical laboratory lighting

Purity Methodologies

Our silver testing center Rohini utilizes a dual-verification process to ensure commercial and investment grade compliance.

biotech

XRF Spectrometry

Non-destructive elemental analysis that identifies the exact composition of silver alloys within seconds. Critical for hallmarking and retail verification.

Professional scientist using a handheld XRF spectrometer on a silver piece in a lab
Precision: 0.01%Time: 120s
local_fire_department

Fire Assay

The global standard. Using thermal extraction in a cupellation furnace to isolate pure silver from lead and impurities at 980°C.

ISO 11427 Standard
balance

Hydrostatic Balance

Measuring specific gravity to detect internal tungsten or lead cores hidden inside large silver bullion bars.

Accuracy85% Verification
verified

Accredited Assays

All results are provided with an encrypted digital certificate valid worldwide, signed by a senior chemical assayer.

history_edu

Legacy Spot Assay

Acid and chemical streak analysis carefully executed to check antique silverware, heritage coins, and filigree art.

01

Secure Submission

Each silver item is cataloged into our private ledger with high-resolution macro photography and weight verification.

02

Multi-Spectrum Scan

Items undergo triplicate scanning using independent spectroscopic sensors to eliminate margin of error.

03

Certified Assay Report

A comprehensive purity report detailing exact alloy compositions is issued and embossed with our laboratory seal.

A scientist in a lab coat holding a silver ingot and comparing it to a digital purity report

Frequently Asked Questions

Find answers to common queries regarding silver hallmarking, 925 sterling purity tests, and chemical assaying.

How is silver purity tested at AGL?

keyboard_arrow_down
We verify silver purity using non-destructive X-Ray Fluorescence (XRF) spectrometry for surface alloys and traditional chemical Fire Assay (cupellation at 980°C) for complete core verification. Hydrostatic balances are also used to test internal densities on larger bullion pieces.

What are the common purity standards for silver assets?

keyboard_arrow_down
The most common standard is Sterling Silver (92.5% pure silver, often marked as 925). We also test Fine Silver (99.9% pure, marked as 999) typically used in investment bullion bars, and lower purity silverware grades ranging down to 80% purity.

Can XRF testing detect heavy-metal plating on silverware?

keyboard_arrow_down
Handheld XRF scans read surface depths up to a few microns. If a brass or copper base is thickly plated with sterling silver, XRF alone might misidentify it. To check for internal metals, our silver testing laboratory in Delhi uses hydrostatic specific gravity density measurements and, when necessary, micro-scraping tests.

Do you test antique silverware and heritage coins?

keyboard_arrow_down
Yes, we perform specialized non-destructive tests (spectrometry, density balance, and spot chemical tests) designed specifically to check antique heritage silver pieces, utensils, ornaments, and old currency coins without damaging their historical value.
45k+
Tests Completed
99.9%
Accuracy Rate
24h
Standard TAT
ISO
9001 Certified