About Us

Maria K Jewellery has been founded in 2021 by Maria Kostina who is a GIA Graduate Gemologist, jewellery designer and an experienced CAD modeler. This unique set of gained skills provides Maria K Jewellery the ability to offer unparalleled expertise in creating one-of-a-kind and bespoke custom jewellery pieces such as engagement rings, wedding bands to name a few but not limited to, for any types of diamonds and gemstones! Maria who is an award-winning jewellery designer works closely with expert master jewellers, stone setters and casting houses all based in Sydney, Australia with a combined industry experience spanning over 100 years between all the team members. Maria checks and performs strict quality control at each step of the process so that you receive the best quality piece crafted just for you. 

The process of creating your bespoke engagement ring or a cocktail ring involves many jewellery professionals who are experts in their field. From lapidarists to stone setters and from master jewellers to 3D printing experts and casting houses. This is where Maria’s expertise comes in and her eye for detail to check each step of the way. Maria’s 5-year experience in the industry began from attending GIA at the world headquarters in Carlsbad to study Gemology which led to completing a certificate in Jewellery Design and a Diploma in Jewellery Design and Technology. Maria has been working in the industry at wholesale level, trading-coloured stones and doing 3D CAD design work for jewellery stores and jewellery designers worldwide. Her passion for the industry has grown even stronger and Maria wanted to bring her own designs to life directly to private clients and so Maria K Jewellery was born!

Since entering the industry in 2016 Maria has developed many connections and relationships in the jewellery industry with industry leaders and fellow gemmologists - consistently learning new trade practices and keeping up with the new ongoing gemstone treatments which is so vital in our industry as the rapid development in technology keeps us on our toes detecting treatments and synthetics.

​Having a graduate gemologist hand selecting a wide range of loose coloured stones gives you the confidence to select natural-coloured stones or diamonds of exceptional quality for your special jewellery piece. 

As a jewellery designer, Maria has a keen eye in selecting the trending jewellery for your consideration from around the world! Whether it's her own designs with natural-coloured gemstones set in karat gold or intricate sterling silver pieces with enamel or exclusive representation of international designers on the Australian market gives you the opportunity to select the best that the world has to offer.