Cullen

Cullen

Direct-to-consumer ethical lab-grown jewellery

Overview

Cullen Jewellery makes fine jewellery in Melbourne using ethically sourced lab-grown gemstones such as diamonds, moissanite, and sapphires. Customers order through a direct-to-consumer model online, with bespoke, made-to-order pieces and personal support via virtual appointments and physical showrooms; stones are carbon-neutral and certified by IGI and GIA. The brand differentiates itself with clear sourcing, ethical practices, and social responsibility, plus a hybrid online-offline approach that serves a global market. Its goal is to disrupt traditional jewellery by delivering affordable, high-quality, ethically sourced pieces at scale while expanding its international footprint and continuing its social initiatives.

About Cullen

Simplify's Rating
Why Cullen is rated
C+
Rated C on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Social Impact

Design

Consumer Goods

Company Size

51-200

Company Stage

N/A

Total Funding

N/A

Headquarters

N/A

Founded

2018

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Simplify's Take

What believers are saying

  • Cullen had 107 staff by January 2025, showing strong operational scaling.
  • New Adelaide, Auckland, London, Toronto, and San Francisco showrooms broaden its customer reach.
  • 2026 demand for colored lab diamonds and sapphires matches Cullen’s expanding product line.

What critics are saying

  • Lab-grown diamond prices keep compressing, letting Brilliant Earth and Clean Origin undercut Cullen.
  • Fifteen planned 2025 international stores strain execution, leasing, staffing, and cash discipline.
  • If showroom expansion stalls, Cullen risks becoming a niche premium brand in a commoditized market.

What makes Cullen unique

  • Cullen sells only lab-grown gemstones, anchored by ethical sourcing and carbon-neutral branding.
  • Its made-to-order, digital-first model pairs online consultations with physical showrooms.
  • The brand’s 2025-2026 international rollout separates it from local-only Australian jewellers.

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Benefits

Flexible Work Hours

Wellness Program

Employee Discounts

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