Astro Gallery has been and remains one of the foremost and respected collectible gem and mineral voices in the world. Astro Gallery has transformed itself beyond just a retail gallery. Dennis Tanjeloff has made his mark at Astro Gallery by putting more of the business’ focus on courting serious collectors looking for unique, top-quality, specimens. Over recent years, Astro Gallery has been instrumental in advising and curating multi-million dollar collections for the most accomplished collectors and natural history museums worldwide.