Trade & Sell Old Gold, Diamonds & Watches – Cassims & Co. Johannesburg



Trade & Sell Old Gold, Diamonds & Watches – Johannesburg & South Africa
At Cassims & Co., we buy and trade pre-owned luxury watches, old gold, diamonds, and fine jewellery — offering fair value, transparent pricing, and a returns-driven service. Whether you are selling or trading in, our expert team is here to give you the best offer and a seamless experience.
We also source high-quality pre-owned watches for our collection, meaning you’ll find a curated range of luxury timepieces at competitive prices.

Why Choose Cassims & Co. to Sell or Trade Your Items?

✔ Trusted family-run jeweller & watch specialist with decades of experience
✔ Expert appraisers and watch experts on site
✔ We buy: old gold, diamond jewellery, lab-grown diamonds, luxury watches
✔ We trade in luxury watches and jewellery — so you get value back when upgrading
✔ Transparent pricing: no hidden fees, honest offers, clear explanations
✔ Secure, insured handling and nationwide collection options
✔ Convenient Johannesburg showroom and secure courier service
✔ We source pre-owned luxury watches — meaning you can sell to us or trade up

What We Buy & Trade

  • Old gold jewellery (9K, 18K, platinum, silver)

  • Diamond rings, lab-grown diamonds, fine gemstone jewellery

  • Pre-owned luxury watches (Swiss automatics, quartz, high-end brands)

  • Heirlooms, vintage pieces, designer jewellery & watches

  • Unwanted jewellery you’d like to trade for something new

We have a dedicated sourcing team for pre-owned watches — so if you own a luxury timepiece you no longer wear, we’re interested.

How Our Selling & Trading Process Works

1. Inspection & Best Offer

Bring your items to our Mall of the South showroom or send images via WhatsApp. We assess material, condition, brand, movement (for watches), stones, and current market value — then give you a clear offer.

2. Choose Your Option: Cash or Trade

Accept either:

  • Cash: immediate payment or secure bank transfer

  • Trade-in: upgrade to new or pre-owned luxury watches or jewellery, and get full credit for your items

3. Secure Payment or Trade

Once you accept the offer:

  • We handle the paperwork, secure delivery or collection, and insured payment

  • For trades: we apply full value of your items toward your next piece, reducing your investment

4. Collection or Upgrade

Pick up your payment, or select your trade-item from our curated selection. Either way, you get value, convenience, and transparency.

We Work With All Budgets & Assets

It doesn’t matter if you’re trading a luxury watch or selling a single gold chain — we deal in high-value and modest-value items alike.
Because we both buy and trade, you often unlock more value by trading in than simply selling — and you open the door to incredible watches and jewellery without paying full price.

FAQ – Trade & Sell Old Gold, Diamonds & Watches

Do you buy old gold and silver jewellery?
Yes — we buy gold (9K/18K), platinum, and silver jewellery.

Do you buy lab-grown diamonds and fine stones?
Yes — we buy both natural and lab-grown diamonds, and fine gemstone pieces.

Can I trade my items instead of receiving cash?
Absolutely — you can trade in your items for new or pre-owned watches and jewellery.

What luxury watches do you buy?
We buy pre-owned Swiss and high-end brand watches, mechanical or quartz. Send us a photo or bring it in.

Is my item insured while you handle it?
Yes — all items in our care are logged, insured, and handled securely.

How quickly can I get paid or trade?
Once we accept your item and you agree to the offer, payment or trade is immediate or arranged next business day.

Why Cassims & Co.?

✔ Family-owned jeweller & watch specialist with decades in the industry
✔ Transparent, honest offers and trades
✔ Highest integrity, best value for your items
✔ Secure, professional service — no auctions, no surprises
✔ Based in Mall of the South, Johannesburg, and servicing clients nationwide

Ready to Sell or Trade Your Items?

📞 WhatsApp: 078 798 6959
📍 Mall of the South, Johannesburg
✉️ info@cassimsandco.co.za

Send photos of your items or drop by our store — we’ll give you a no-obligation quote and help you unlock value today.