Business Details
25 Years
experience
Antique & Modern Fine Jewellery in Mayfair, London
Established in 2001, S. Greenstein & Co & Co has built a reputation for excellence in antique and contemporary fine jewellery. Our expertise in natural diamond engagement rings, honed through decades of family heritage and formal qualifications from the Gemological Association of Great Britain (GEM-A), ensures unparalleled quality. With a scientific approach to retail management and global industry connections, we offer curated collections of vintage and modern pieces, each authenticated for enduring value. Our commitment to ethical sourcing, including exclusive natural diamonds certified by the Gemological Institute of America (GIA), reflects our dedication to transparency.We provide bespoke design services, complimentary ring sizing, and worldwide shipping, combining traditional craftsmanship with modern convenience. Our team's academic background in psychology and retail innovation enhances our customer-centric approach, ensuring every client receives expert guidance tailored to their unique preferences.
Services
Antique Jewellery
Diamond Engagement Rings
Bespoke Design
Jewellery Valuation
Worldwide Shipping
Ring Sizing
Vintage Watch Sales
Gemstone Authentication
Heirloom Sourcing
Antique Fair Participation
Details
- Year established: 2001
Highlights and features
- We offer 20+ years of expertise in fine jewellery retail
- Our team includes GEM-A qualified diamond graders
- All diamonds come with GIA certification for authenticity
- We provide complimentary ring sizing post-purchase
- We maintain global industry connections for rare piece sourcing
Associations and certifications
- Gemological Association of Great Britain (GEM-A)
- Gemological Institute of America (GIA)
Services
Antique Jewellery
Our curated antique collection features Georgian, Victorian, and Art Deco pieces with documented provenance. Each item undergoes rigorous authentication to guarantee historical accuracy and material integrity. These one-of-a-kind treasures represent centuries of craftsmanship and design evolution.
Diamond Engagement Rings
Specialising in natural diamond engagement rings, we offer GIA-certified stones with detailed grading reports. Our collection combines traditional settings with contemporary designs, all backed by expert consultation to help clients find perfect symbols of commitment.
Bespoke Design
We create custom jewellery pieces tailored to individual preferences using CAD technology and traditional wax modelling. Clients collaborate directly with our designers to develop unique heirlooms incorporating personal motifs and preferred materials.
Jewellery Valuation
Professional valuation services assess jewellery items using current market data and gemological analysis. We provide detailed written appraisals for insurance purposes, estate planning, or resale preparation by qualified GEM-A associates.
Worldwide Shipping
All purchases receive secure, fully insured international shipping with real-time tracking. We handle customs documentation and packaging to museum standards, ensuring safe delivery of valuable items to any global destination.
People
Saul Greenstein
Co-Owner & Diamond Specialist
Third-generation jeweller with GEM-A diamond grading qualification and retail management expertise. Specialises in natural diamond authentication and heritage jewellery curation, combining family knowledge with academic training from Surrey University and Hult Business School.
Ifediba Nwokedi-Greenstein
Co-Owner
Brings psychological insight and event curation experience to client consultations. Transitioned from education and TEDxEuston organisation to co-manage the business in 2016, focusing on customer experience and collection presentation.
Questions
How do you ensure jewellery authenticity?
We authenticate all pieces through material testing and provenance verification. Natural diamonds come with GIA certificates, while antique items have documented history and period-appropriate craftsmanship analysis.
Can you help design custom jewellery?
Yes, we offer bespoke design services using CAD technology and traditional techniques. Our process includes initial consultation, digital rendering, and wax prototyping to create unique, personalised pieces.
What payment methods do you accept?
We accept Apple Pay, major credit/debit cards, and phone payments. All transactions use secure payment gateways with encryption to protect financial information during purchases.
Do you offer international shipping?
Yes, we provide fully insured worldwide shipping with real-time tracking. All international shipments include customs documentation and museum-standard packaging for item protection during transit.
Can I view items in person?
Our Mayfair showroom at Grays Antiques Market (stand 321-322) displays the full collection. We recommend appointments for detailed consultations, though walk-ins receive warm welcomes during market hours.
Why choose natural over lab-grown diamonds?
We specialise in natural diamonds for their geological rarity and historical value. Natural diamonds have established market value and certification standards, offering tangible heritage compared to laboratory-created alternatives.
