Pure, tested or half-fine zari?

• Pure zari: silver thread electroplated with gold — heirloom value, the costliest.
• Tested zari: silver-coated copper — looks rich, lighter on the pocket, the common choice for festive wear.
• Half-fine / polyester zari: no silver; lighter and budget-friendly.
• Rub the zari gently on the reverse — red copper showing through means tested zari.