22K gold contains 91.6% pure gold — the industry standard for traditional South Indian jewellery, giving pieces their characteristic warm yellow lustre. 18K gold contains 75% pure gold mixed with harder metals, ideal for diamond-set and delicate designs. At Nathu & Sons, traditional temple and bridal pieces are 22K; diamond jewellery uses 18K settings.

Price = (Weight in grams × Today’s gold rate) + Making charges + Wastage + GST. Making charges vary by design complexity (8–25%). Wastage (2–10%) covers metal lost during manufacturing. Our Soubhagya Plan members enjoy zero wastage and zero making charges at redemption — a saving of up to 18%.

Absolutely. Every gold piece at Nathu & Sons carries a BIS hallmark confirming karat purity (22K = 916, 18K = 750). A certificate of purity accompanies every purchase. When buying gold, always insist on the BIS hallmark — it is your guarantee.

The gold rate is the live market price per gram. Making charges are the labour and craftsmanship fee for converting raw gold into jewellery — not recoverable at exchange. This is why Soubhagya Plan’s zero-making-charge redemption is such a powerful financial benefit.

Yes. All gold from Nathu & Sons is eligible for lifetime exchange at the prevailing gold rate on the date of exchange. The jewellery must be in original form. Exchange value deductions may apply based on condition.

Soak in warm water with a drop of mild dish soap for 10 minutes. Scrub with a soft-bristled toothbrush, rinse, and pat dry with a lint-free cloth. Avoid chlorine, bleach, and perfume. Visit us annually for professional polishing.

Yes. Our craftsmen specialise in bespoke gold jewellery. Share your reference image, occasion, and budget — we provide a quote within 48 hours. Custom pieces take 15–25 days. Start via our Video Call service or visit Chandanagar.

Wastage is gold lost during manufacturing — melting, drawing, and shaping (2–10% of gold weight). Soubhagya Plan members at Nathu & Sons pay zero wastage at redemption — one of the most significant financial benefits of the scheme.

We stock 925 sterling silver (92.5% pure) — the global jewellery standard. Select pieces are in 999 fine silver (99.9% pure). Every piece carries a BIS hallmark.

Silver reacts with hydrogen sulphide in air forming silver sulphide — the dark tarnish. Prevention: store in airtight zip-lock bags with an anti-tarnish strip; keep away from humidity, rubber, and perfume.

Line a bowl with aluminium foil, add hot water, 1 tbsp baking soda, 1 tbsp salt. Submerge silver 2–5 minutes — tarnish transfers to the foil. Rinse and buff with a soft cloth. Never use toothpaste — it scratches silver.

Yes. Silver from Nathu & Sons is eligible for exchange at the current market rate. Soubhagya Plan members redeeming on silver enjoy the same 18% VA discount as gold — zero wastage, zero making charges.

Oxidised silver is intentionally darkened with potassium sulphide for a dramatic antique finish. Durable for occasional wear but lightens over time with friction. Wipe gently with a dry soft cloth only — polishing cloths remove the finish.

Pure sterling silver (925) is generally hypoallergenic. If you have nickel sensitivity, confirm the alloy. Our 999 fine silver pieces are safest for highly sensitive skin.

Silver-plated has a thin layer over base metal that tarnishes unevenly as base shows through. Sterling silver (925) is solid throughout — polishes beautifully and lasts generations. Always look for the 925 or BIS hallmark.

Absolutely. Sterling silver is durable enough for daily wear. Avoid chemicals, salt water, and impact. Remove before bathing and exercise. Silver worn regularly stays cleaner — skin oils naturally polish and protect it.

Kundan is one of India’s oldest jewellery traditions, originating in royal Rajasthani and Gujarati ateliers during the Mughal period. Precious stones are embedded in lac and framed with refined 24K gold foil — resulting in spectacular, colourful, regal jewellery.

Yes. Kundan uses two types of real gold: the structural frame (22K) and the setting foil (24K — the highest purity). At Nathu & Sons, every Kundan piece is hallmarked; gold purity and weight are certified separately.

Traditional Kundan uses precious and semi-precious gemstones: rubies, emeralds, sapphires, garnets, and pearls. Some pieces use quality glass (‘jadau glass’). At Nathu & Sons we fully disclose whether pieces contain natural stones or glass.

A lac core is shaped within a gold frame. Stones are pressed into softened lac and secured by packing refined 24K kundan foil around each stone. The reverse is decorated with vibrant meenakari enamel — entirely by hand.

Never use water or liquid cleaners — lac can soften and stones may shift. Wipe the front with a dry, soft, lint-free cloth. Keep away from perfume and perspiration. Store each piece flat in its individual box.

In most cases, yes. Bring the piece to us as soon as possible. Our craftsmen assess the setting, source a matching stone, and re-set using traditional lac and foil technique. Natural stone replacement may take longer.

Kundan is the stone-setting technique using 24K gold foil. Jadau is the same craft with a Rajasthani regional name. Meenakari is the complementary art of enamelling the reverse — nearly all Kundan pieces feature Meenakari on the back.

Kundan is a magnificent bridal choice. The gold (22K frame + 24K foil) retains market value; natural gemstone pieces appreciate with gem markets. We recommend natural stone Kundan for families wanting beauty and long-term value combined.