Exchange services using blockchain technology for trading asset-referenced digital tokens that maintain a stable value by referring to the value of a non-fungible physical commodity, namely a diverse pool of fully cut and raw natural diamonds, for the non-fungible physical commodity; Financial services, namely providing mechanisms designed to maintain the stability of asset-referenced digital tokens trading in the secondary market with reference to the discounted discoverable global purchasing power parity price of a non-fungible physical commodity, namely a pool of natural diamonds, and providing a system of intensive disclosure and transparency as well as governance by an entity with a majority-independent board; Providing information in the field of finance, cryptocurrency, digital and virtual currency and token of value, related to asset-referenced fungible digital tokens and an entrusted and diverse commodity pool supporting a non-fungible physical commodity.