Diamond and engagement ring FAQs

Neither is better. It comes down to what matters most to you.

Natural diamonds are valued for their geological rarity. Lab-grown diamonds have the same physical, chemical and optical properties at a lower price.

We explain both so you can choose with confidence.

Cut. It decides how much light a diamond returns, and a well-cut diamond can look brighter than one of higher colour or clarity.

A document from an independent laboratory, such as GIA or IGI, that records a diamond’s measurements, grades and origin. Many people call it a certificate.

Total diamond weight: the combined weight of every diamond in a piece. A 1.00ct TDW pair of studs is two diamonds of about 0.50ct each.

Yes. You can view and compare in-stock natural and lab-grown diamonds in our Gold Coast showroom, by appointment or as a walk-in, or on a video call.

Compare more than price. Look at diamond quality, cut performance, craftsmanship, warranty, after-sales support and whether you can inspect the diamond before you buy.

Most take approximately two to three weeks, depending on design complexity, diamond availability and workshop scheduling.

At least once every 12 months, so normal wear to claws and settings can be caught early.

Yes. We specialise in both and present each on its own merits, so you can choose what best suits your priorities, budget and preferences.

Yes. Although we operate a wholesale-direct business model, we welcome members of the public by appointment and we also accept walk-ins.

We operate a wholesale-direct business model, so you buy directly rather than through a traditional retail mark-up structure. Pricing varies depending on the diamond, metal and design selected.

We aim to provide competitive pricing from the outset rather than relying on frequent discounting. From time to time we may run promotional offers.

Many of our pieces are made and finished by our in-house jewellers, while others are produced through trusted manufacturing partners. Every piece is quality checked before it reaches you.

Yes, where practical. At your consultation we assess the piece and discuss the design options.

Yes. We offer inspections, professional cleaning, resizing, repairs and maintenance. Jewellery bought from CTJ includes complimentary ultrasonic cleaning and inspection.

We don’t write valuations or appraisals ourselves. We can arrange an independent insurance valuation through a registered valuer we work with. We don’t buy gold or jewellery, and we don’t repair watches.

We combine wholesale-direct pricing with one-on-one consultations, in-stock natural and lab-grown diamonds you can view before you buy, and in-house jewellers. Our job is to help you make an informed decision, not to sell a particular product.

Yes. We provide quotations and design concepts with no pressure to buy on the day, so you can compare options or talk it over first. If you have a proposal or wedding date, we plan production timeframes around it.