Great Tanz Competitors

At GIA, we believe every gem has a story — formed deep within the earth and revealed through science. For nearly 100 years, we’ve been bringing those stories to light through research, discovery and education. As a nonprofit, our mission is to ensure confidence in gems and jewelry by blending innovation, knowledge and science. From creating the 4Cs of diamond quality to inventing tools used worldwide, we make learning an adventure and turn discovery into truth. We don’t buy, sell or appraise gems. Instead, we provide trusted reports, education, and insights that help people — from industry professionals to everyday consumers — make informed decisions with clarity. This is GIA: where curiosity fuels innovation, knowledge builds confidence and science inspires a world of trust.

At Jewelry Television® our mission is to open the world of fine jewelry and gemstones to everyone. Whether it's a special gift, rare gemstone, or fast-paced auction that you're looking for, Jewelry Television® has it all! For employment opportunities, please visit www.jtv.com/careers.

Blue Nile was founded in 1999 with the idea that the diamond and engagement ring business was ready for innovation. In 2022, it was acquired by Signet Jewelers, and to this day, it continues to operate as the original online jeweler, offering smart luxury and meticulous craftsmanship. The brand's legacy has earned the trust of millions of satisfied customers, providing them with the confidence to make smart choices. This is achieved through Blue Nile’s commitment to secured deliveries, industry-leading Diamond Certification and 24/7 Expert Advice. Its high-quality standards and vast assortment make it a one-stop shop for all needs. This is further supported by solutions like 360-degree diamond viewing and honest, un-commissioned customer service, which empower them to make a confident choice that truly fits their needs, free from sales pressure or upselling. While operating online, Blue Nile also has stores around the country.