Synthetic star rubies and sapphires were manufactured by the Linde Air

Signed Linde Blue Star Sapphire 9x7mm Oval Synthetic Star Sapphire

I would like to know the approximate value of this star blue

A mite with exceptionally long front legs (2.1 mm), as seen using

Synthetic Gemstone Guide

Karl Schmetzer's research works Munich Re, München and other places

Star Ruby the eternal gemstone [Synthetic Star Rubies]

Signed Linde Star Ruby 9x7mm Oval Synthetic Star Sapphire Man Made

Dual-Color Double Stars in Ruby, Sapphire, and Quartz: Cause and

Synthetic star rubies and sapphires were manufactured by the Linde

This star sapphire is fake as hell am I right? Otherwise it is out