Rough & Polished

• http://www.agddiamond.ru/
• https://www.jewellerybusiness.com/features/diamond-evolution-why-the-4cs-is-no-longer-an-adequate-pricing-system/
• https://www.womensjewellerynetwork.com/blog-1/2019/7/31/wjn-x-disrupting-diamond-marketing
• https://www.thenational.ae/business/technology/sparkle-fades-for-diamond-industry-as-demand-wanes-1.895069
• https://www.gjepc.org/