Mastering Platinum in Jewelry

Master the physical properties, metallurgy, identification, testing methods, and bench-working principles of platinum in the fine jewellery industry.

Mastering Platinum: The Ultimate Guide for Jewellers and Gemologists

• Duration: 2 – 3 Weeks (Self-paced or hybrid)
• Target Audience: Bench jewellers, gemology students, pawnbrokers, valuation professionals, and luxury retail consultants.

Module 1: The Platinum Profile – Properties & Alloys

• The Unique Chemistry: Density, melting point, malleability, and noble metal characteristics.
• Platinum vs. The Competition: A structural comparison of Platinum vs. White Gold (and rhodium plating) vs. Palladium.
• Standard Jewellery Alloys: * 950Pt vs. 900Pt and the roles of alloying elements (Ruthenium, Iridium, Cobalt, and Copper).
  • How choice of alloy affects hardness, casting, and brittleness.
• The “Patina” Factor: Understanding surface displacement versus metal loss over time.

Module 2: Authentication, Hallmarks & Counterfeit Detection

• Global Hallmarking Standards: Reading and identifying international stamps (e.g., $950\text{ Plat}$, $\text{Pt950}$, $900\text{ Platinum}$).
• Regulatory Compliance: Navigating local and international precious metal legislation regarding stamping and purity guarantees.
• Spotting the Fakes: How to identify platinum-plated silver, stainless steel, and palladium masquerading as high-grade platinum.

Module 3: Hands-On Testing & Valuation Techniques

• Non-Destructive Testing Protocol: * Specific Gravity testing for heavy white metals.
  • Electronic metal testers vs. XRF (X-ray Fluorescence) spectrometry.
• Chemical Testing (Acid & Touchstone): Safe handling and application of aqua regia/specific platinum test acids, and interpreting the reaction.
• Valuation Math: Calculating scrap and intrinsic value based on current spot prices, purity percentages, and manufacturing surcharges.

Module 4: Bench Essentials & Manufacturing Realities

• Working on the Bench: Why platinum behaves differently under a torch (no firecoat required, high heat conductivity).
• Contamination Hazards: Crucial hygiene rules to prevent cross-contamination from gold, silver, or iron (which embrittles platinum).
• Solder vs. Laser Welding: Selecting the right platinum solders (seamless transitions) and the advantages of PUK/Laser welding for prongs and resizing.
• Polishing and Finishing: The multi-step compounding process required to achieve a flawless mirror finish on an incredibly tenacious metal.

Course Instructor

Jewellery University Author