Xennox Diamonds

What Xennox Diamonds does

Xennox Diamonds is a Brisbane-based, family-owned diamond jeweller founded in 1976 by Wolfgang and Georgette Schwantes and now led by their son Karl Schwantes. The business operates a single showroom at Level 2, 141 Queen Street, in Brisbane's Queen Street Mall, with an attached on-site workshop where all pieces are handcrafted. The company employs a team of six, including master craftsmen with over 150 years of combined experience, and serves primarily Brisbane and South East Queensland couples planning engagements and weddings, plus a smaller segment of high-net-worth individuals seeking bespoke and VIP concierge service.

The product portfolio centres on handcrafted engagement rings (the signature Starlight Range sub-collections Ara, Lyra, Orion, and Vela), wedding bands, and fine diamond jewellery including pendants, earrings, bracelets, and necklaces. Custom designs use Computer-Aided Design (CAD) renders and hand sketches presented for client approval before production. The firm sources GIA- and IGI-certified diamonds and specializes in CVD Type IIa lab-grown diamonds — the purest form of carbon, representing less than 2% of mined diamonds — offered alongside natural diamonds. Pricing spans from $2,500 entry-level engagement rings to $8,000+ natural diamond designs, with most Brisbane clients spending $5,000-$12,000; lab-grown engagement rings start at $5,200 and run 40-60% below equivalent natural diamonds. All pieces carry a lifetime manufacturing warranty, with cleaning, resizing, and repair handled in-house.

Xennox's go-to-market combines a direct-to-consumer showroom and appointment model with e-commerce for ready-to-wear items (90+ SKUs), a VIP concierge service in which Karl Schwantes travels to client locations, and educational content marketing. Revenue is generated entirely through one-time retail sales of bespoke and ready-to-wear jewellery. Distribution is single-country/domestic (Australia), and customer concentration is spread across individual consumers rather than enterprise accounts. The firm has accumulated 1,500+ five-star Google reviews, multiple ABIA regional and national bridal-jewellery awards, and a charitable partnership with Starlight Children's Foundation tied to each engagement ring sale.

Name

Xennox Diamonds

Legal name

Xennox Diamonds

Website

https://xennoxdiamonds.com.au

Company type

Private

Founded year

1976

Operating status

Operating

Headcount range

1–10 employees

Short description

Brisbane-based family-owned jeweller founded in 1976, handcrafting engagement rings, wedding bands, and fine jewellery from a Queen Street Mall showroom with on-site workshop. Serves couples and high-net-worth individuals with GIA/IGI-certified natural and CVD Type IIa lab-grown diamonds.

Ownership category

akta.pro rank

Product category

Fine Jewellery

NAICS

Jewelry Retailers (458310), Jewelry Retailers (45831)

SIC

Jewelry, Precious Metal (3911), Retail-Jewelry Stores (5944)

akta.pro industry

PRIMARYCRAKACAA

Engagement Rings

Consumer Products & Retail/Jewelry, Watches & Luxury Accessories/Bridal & Engagement Jewelry

SECONDARYCRAKACAC

Bridal Ring Sets (Engagement + Wedding Band Sets)

Consumer Products & Retail/Jewelry, Watches & Luxury Accessories/Bridal & Engagement Jewelry

SECONDARYCRAKAGAJ

Custom/Bespoke Jewelry Retail Studios

Consumer Products & Retail/Jewelry, Watches & Luxury Accessories/Jewelry & Watch Retail (Omnichannel/Specialty)

SECONDARYCRAKAHAA

Bespoke Fine Jewelry (Precious Metals & Gemstones)

Consumer Products & Retail/Jewelry, Watches & Luxury Accessories/Custom Jewelry Design & Bespoke

SECONDARYCRAKAJAM

Synthetic/Lab-Grown Diamonds & Gemstones (Manufacturing & Trading)

Consumer Products & Retail/Jewelry, Watches & Luxury Accessories/Gemstones & Diamonds (Cutting, Trading, Certification)

SECONDARYCRAKACAF

Lab-Grown Diamond Bridal Jewelry

Consumer Products & Retail/Jewelry, Watches & Luxury Accessories/Bridal & Engagement Jewelry

SECONDARYCRAKACAG

Bridal Jewelry Customization & Bespoke

Consumer Products & Retail/Jewelry, Watches & Luxury Accessories/Bridal & Engagement Jewelry

Keywords

• Engagement rings
• Wedding jewellery
• Lab-grown diamonds
• Custom jewellery design
• Fine diamond jewellery

Headquarters

HQ city

Brisbane

HQ country

Australia

HQ region

Oceania

Offices1 record

Markets served

GTM type

B2C

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Marketing or Sales, Infrastructure

Revenue model

1. Diamond Engagement Rings: One-time sales of custom and ready-to-wear engagement rings with natural and lab-grown diamonds. Prices range from $5,200 for lab-grown solitaires to $8,000+ for natural diamond designs.
2. Wedding Rings: One-time sales of custom and ready-to-wear wedding bands in gold, platinum with various styles including classic, diamond, eternity, vintage, contoured and stackable.
3. Diamond Jewellery: Earrings, pendants, bracelets and other fine jewellery featuring certified diamonds. Products include disc pendants, cluster claw studs, oblong trace necklaces.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Xennox Diamonds is a Brisbane-based jewellery house founded in 1976 that designs, manufactures, and sells handcrafted engagement rings, wedding rings, and fine diamond jewellery using GIA- and IGI-certified natural and lab-grown diamonds. The business offers bespoke custom design, an in-house workshop with master jeweller craftsmanship, a Brisbane showroom, e-commerce sales, and a VIP concierge service for private appointments, alongside jewellery repair and maintenance.

Product overview

Xennox Diamonds is a Brisbane-based multi-award-winning diamond jewellery store offering handcrafted engagement rings, wedding rings, and fine jewellery. The company operates an on-site Brisbane workshop where all pieces are designed and crafted using natural and lab-grown diamonds certified by GIA and IGI. The product portfolio centers on the Starlight Range engagement ring collections (Ara, Lyra, Orion, Vela), complemented by diamond jewellery (pendants, earrings, necklaces), wedding bands, and custom design services. The company offers VIP concierge appointments, bespoke design consultations, and repair services, with all pieces backed by lifetime care support.

Differentiator

Problem solved

Functional benefit

Products and services

• Handcrafted Engagement Rings

Quantifiable outcome

• 1,500+ five-star Google reviews
• +2 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

One partnership is on record.

• Starlight Children's FoundationminorOthersEach engagement ring purchase includes a $100 donation to support sick children through Starlight Children's Foundation. This is a charitable partnership supporting children's health.

Scale indicators6 records

Recent moves6 records

Expansion highlights4 records

Emerging players

• Mejuri: Direct-to-consumer fine jewellery brand with strong digital presence and lab-grown diamond expansion. Comparable on premium fine jewellery positioning, DTC model, and growing lab-grown category exposure.
• Brilliant Earth: US-based direct-to-consumer diamond jeweller focused on lab-grown and ethically sourced diamonds with strong digital showroom model. Comparable on lab-grown diamond specialisation and DTC custom engagement ring positioning.

Broad incumbents

• Tiffany & Co. Global luxury jewellery incumbent with iconic engagement ring franchise and broad diamond jewellery assortment. Comparable as a benchmark for premium bridal diamond positioning, though vastly larger scale and omnichannel.
• Blue Nile: Large online diamond retailer offering GIA-certified diamonds and custom engagement ring settings with transparent pricing. Comparable on certified diamond distribution and custom engagement rings, though with much broader catalogue and digital scale.
• Harry Winston: Global luxury jewellery house renowned for high-end diamond jewellery and bridal pieces. Comparable as a benchmark for premium diamond bridal positioning and craftsmanship reputation.
• Michael Hill Jeweller: Australia and New Zealand jewellery chain offering engagement rings, wedding bands and diamond jewellery across many retail locations. Comparable as a competing Australian bridal jewellery retailer with omnichannel presence.

Regional players

• Anton Jewellery: Brisbane-based bespoke jeweller offering custom engagement and wedding rings with master jewellers. Direct geographic peer operating in the same Brisbane market with similar bridal positioning.

Direct peers

• Solid Gold Diamonds: Melbourne-based bespoke diamond jeweller specialising in custom engagement rings with GIA-certified diamonds and on-site master jewellers. Comparable business model and product mix to Xennox's Brisbane operation.
• Larsen Jewellery: Sydney-based bespoke diamond jeweller offering handcrafted engagement and wedding rings with in-house design and CAD-based custom services. Highly comparable as an Australian family-style boutique with similar bespoke bridal focus and on-site workshop model.
• Diamondport: Australian bespoke online and showroom diamond jeweller offering custom engagement rings with GIA-certified stones and CAD design. Comparable on product, customer (Australian couples), and custom design service model.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/xennox-diamonds

Revenue estimate

Valuation estimate

Number of profiles

Profiles6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Xennox Diamonds