21:3) which can be the fulfillment of the last feast, THE Feast of Tabernacles where by all nations were being welcome in Jerusalem, also referred to as the Feast of countries within the fifteenth of Tishri. Jacinth or hyacinth is a important stone of the same colour as the hyacinth https://richardfrench.net/what-is-the-new-jerusalem-heaven-on-earth-in-revelation-21-22/