BRILLIANT DIAMOND

Business Details

50+ Years

experience

Luxury Diamonds & Custom Jewellery in Sydney

Established in 1968, BRILLIANT DIAMOND is a family-owned business with a legacy rooted in craftsmanship and expertise. Our journey began in Gothenburg, Sweden, where founder Arto Agopyan honed his skills under Armenian goldsmiths in Istanbul before establishing a reputation for quality that endures today. Now operating from Sydney's historic Dymocks Building, we combine traditional artistry with modern precision to deliver exceptional diamonds, custom jewellery, and repair services.

Our team includes Australia's youngest gemologist and diamond technologist, alongside TAFE-qualified watchmakers, ensuring every creation meets rigorous standards. Accredited by the Gemmological Association of Australia and the National Council of Jewellery Valuers, we prioritise transparency, authenticity, and value. From engagement rings to timepiece restoration, our dedication to excellence has made us a trusted name across Australia.

Services

Diamond Supply & Sales Custom Made Jewellery Jewellery Remodelling Jewellery Valuations Watch Repair & Servicing Clock Repair & Servicing Engagement Ring Design Diamond Grading Estate Jewellery Appraisals

Details

Year established: 1968

Highlights and features

Family-owned legacy of craftsmanship since 1968
Australia's youngest gemologist and diamond technologist on staff
Accredited experts providing precise jewellery valuations
Custom designs blending traditional artistry with modern techniques
On-site TAFE-qualified watchmaker for precision timepiece repairs

Associations and certifications

Gemmological Association of Australia
National Council of Jewellery Valuers

Website

Update Listing

Services

Diamond Supply & Sales

We source and supply premium diamonds from global origins, offering certified stones with guaranteed authenticity. Our inventory caters to diverse preferences, from classic cuts to rare gems, with expert guidance to ensure perfect selection. Each purchase includes documentation verifying quality and value.

Custom Made Jewellery

Transform your vision into reality with handcrafted custom jewellery. Our designers create unique pieces using traditional techniques, incorporating client-specified materials and styles. From concept sketches to final polish, we ensure every detail reflects your personal story and aesthetic preferences.

Jewellery Remodelling

Revitalise outdated or damaged pieces into contemporary designs while preserving sentimental value. Our artisans expertly repurpose metals and stones, maintaining original quality while creating modern interpretations that align with current tastes and wearability standards.

Jewellery Valuations

Receive accurate, insurance-compliant valuations from GAA-certified experts. We assess diamonds, gemstones, and precious metals using industry-standard methodologies, providing detailed reports that document authenticity, quality metrics, and current market value for estate planning or insurance purposes.

Watch Repair & Servicing

Our TAFE-qualified watchmaker performs precision repairs and servicing for luxury and vintage timepieces. Services include movement overhaul, water resistance restoration, and component replacement using manufacturer-approved parts, ensuring optimal functionality and longevity for mechanical and quartz watches.

People

Arto Agopyan

Founder

Established the business in 1968 after training under Armenian goldsmiths in Istanbul. Recognised for hallmark craftsmanship still valued in Swedish auctions, he laid the foundation for the family's jewellery legacy now continued in Australia.

Masis Agopyan

Director & Gemologist

Australia's youngest qualified gemologist and diamond technologist, holding multiple accreditations from GAA and NCJV. With expertise spanning jewellery design, valuation, and auctioneering, he leads the business with third-generation craftsmanship and technical innovation.

Questions

What custom jewellery design options are available?

We offer complete customisation for rings, necklaces, and bracelets using client-specified materials. Our designers create hand-drawn concepts before crafting, ensuring unique pieces that match personal style preferences.

Do you provide jewellery valuation certificates?

Yes, our GAA-certified valuers issue detailed appraisal reports documenting authenticity, stone quality, and current market value for insurance or estate planning purposes.

Can damaged heirloom jewellery be restored?

Our remodelling service revitalises damaged or outdated pieces, preserving precious materials while incorporating modern designs. We maintain original quality while updating wearability and aesthetics to contemporary standards.

What watch repair services do you offer?

Our TAFE-qualified watchmaker services mechanical and quartz movements, restores water resistance, and replaces components using manufacturer-approved parts. We specialise in vintage watch restoration while maintaining original functionality.

Are diamonds guaranteed conflict-free?

All diamonds come with certification verifying ethical sourcing and authenticity. We adhere to strict procurement standards ensuring compliance with Kimberley Process requirements for conflict-free stones.

Reviews (5)

Write a Review

Marissa K.

Dec 28, 2021 Report

My husband and I stopped in almost 15-20 jewelry stores in the Diamond District looking for something specific for his birthday. We started to get discouraged until we walked into Danielas. First off, youre getting a different experience here. The employees are VERY friendly, accommodating, and really make an effort to answer every question. We knew we were making the right choice coming here, and we found exactly what we were looking for. They have a great selection. They worked with us on a price that we were comfortable with and they were super kind! Im a native New Yorker, and I know

Jordan Mann

Nov 17, 2021 Report

Daniela Diamonds is hands down the best jeweler in NY . They are very honest and hold your hand throughout the whole process. Go see Gaby & Johnny for all of your jewelry needs!

Vinaita Jain Dumera

Oct 23, 2021 Report

My go-to jewelry store ! The quality of everything I've bought is superb ! Everyone at the store is beyond wonderful and so so helpful. I always recommend it to all my friends and family. The only place I'll ever be going too !!

Varun Paras

Oct 22, 2021 Report

Full credit goes to Daniela Diamonds for this extremely beautiful engagement ring. Gaby was instrumental in helping my friend Mike make the right choice, and his fianc was totally blown away when he proposed. I will continue to shop at Daniela Diamonds and will be sure to recommend my friends and family. Thanks Gaby!

Sean

Sep 15, 2021 Report

I was recommended Daniela Diamonds by a friend to purchase an engagement ring. Once I arrived Gabriel helped me to pick out the exact diamond that I was looking for with the perfect setting. Very accommodating, informative, and professional. I highly recommend this place.