I was asking because yesterday someone at Parmigiani mentioned to me that they supply dials to Lange. Furthermore, Parmigiani began using aventurine on some of its watches in 2016. Again, to reiterate: my question arose out of interest concerning the sharing of knowledge and resources within the industry. Both the Lange and the Parmigiani aventurine dials are magnificent and inspiring. I would be happy to see more maisons making and/or offering such beatiful dials. Best regards!