"A by JH" or "Angela by JH" is a signature line from the renowned, Bali-based jewelry brand John Hardy. These pieces typically feature a mix of sterling silver and 14k gold accents, often with Balinese-inspired designs, and are frequently marked with "JH" and "925".

John Hardy is a renowned jewelry brand established in 1975 in Bali, deeply rooted in sustainable luxury, Balinese artistry, and environmental activism. They are famous for using 100% reclaimed silver and gold, and they plant bamboo seedlings through their "Wear Bamboo, Plant Bamboo" program, having planted over 1.5 million to date. 

Here are some of the most interesting facts about John Hardy:

• Eco-Friendly "Kapal Bambu" Workshop: The brand's workshop and showroom in Mambal, Bali, is a stunning structure made of bamboo, thatch, and native grasses, designed to "float" above the rice fields. It uses natural ventilation and includes an underground vault lined in beeswax.