Black square natural test stone, a flat slab with a matt surface, lying on linen

Premium Natural Test Stone for Silver Gold Jewellery Testing, Scratch Acid Tester, Black 2" x 2"

£9.99
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Black square natural test stone, a flat slab with a matt surface, lying on linen
SKU: JJ-JFYD-GV3L

Premium Natural Test Stone for Silver Gold Jewellery Testing, Scratch Acid Tester, Black 2" x 2"

£9.99
In stock — dispatched from the UK
Order by 2pm UK time, Mon–Fri — we aim to dispatch same day
Free UK delivery
30-day returns
Secure checkout
UK registered
Free UK deliveryOn every order
Same-day dispatch targetOrder before 2pm UK time, Mon–Fri
30-day returnsUnused, original packaging

For UK jewellers and pawnbrokers who need to verify the fineness of precious metals, this natural test stone provides a reliable surface for acid testing. Its dark, high-contrast face makes observing the colour reaction of gold and silver streaks straightforward and accurate whilst performing assays.

Key features

  • Natural stone with a fine-grain surface for a clean metal streak.
  • Dark grey-black colour provides high contrast for viewing streak and acid reactions.
  • Cut into a solid 2" x 2" square block for a stable testing base.
  • Designed for use with testing acids to determine gold, silver, and platinum fineness.
  • Durable and reusable surface that can be cleaned between tests.

Who it's for

An essential bench tool for UK bench jewellers, pawnbrokers, and bullion dealers. Also suitable for antique dealers and hobbyists who need to reliably verify precious metal content before purchase or repair.

Specifications

  • Material: Natural Stone
  • Dimensions: 2" x 2" (approx. 51mm x 51mm)

Free UK delivery · Same-day dispatch target for orders before 2pm Mon–Fri · 30-day returns

Specifications
Material Natural Stone
Dimensions 2" x 2" (approx. 51mm x 51mm)
Approx. shipping weight Approx. 75g
Compatibility Designed for use with testing acids to determine gold, silver, and platinum fineness

Is this the right tool for you?

Best for

  • UK jewellers verifying precious metal fineness
  • Pawnbrokers assessing gold and silver items
  • Bullion dealers confirming metal content
  • Antique dealers checking jewellery authenticity
  • Hobbyists reliably testing precious metals

Not for

  • Quantitative metal analysis requiring precise percentages
  • Use without appropriate testing acids
  • Cutting or shaping jewellery materials

How this compares

Premium Natural Test Stone... Alternatives
Material Natural stone Synthetic composite or ceramic
Surface quality Fine-grain for clean metal streak Coarse or inconsistent surface
Contrast Dark grey-black for high visibility Lighter grey with poor streak visibility
Stability Solid 2" x 2" square block Smaller, irregular, or lightweight piece

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