Pink sapphire derives its coloration from either chromium or titanium impurities. In the presence of increasing chromium levels, sapphire transitions into red, commonly referred to as ruby within the market. Pink sapphire exhibits a wide spectrum of shades, ranging from light pink to neon pink.
Conversely, titanium-infused sapphires encompass a spectrum from light pink to reddish pink. The blue coloration in natural sapphires, attributed to titanium, is, in reality, a result of trace amounts of iron combined with titanium. In controlled laboratory environments devoid of iron, titanium-doped corundum crystals manifest in pink hues. The degree of titanium dopant concentration directly impacts the intensity of the color, with darker crystals often exhibiting a secondary orange tint reminiscent of fine padparadscha sapphires. These sapphires are commonly known as "pink laser sapphire" and primarily find application as tunable laser material, displaying red/infrared fluorescence when exposed to blue and green light sources.