No reserve price - 2 pcs Yellow, Brown, Bi-colour Quartz - 11.51 ct - International Colored Gemstone Association (ICA GemLab)

Bi-color quartz gemstones showcase two or more distinct colors within a single crystal, creating naturally divided or blended zones of color that appeal to collectors and jewelry designers alike. This lot comprises two pieces of yellow, brown, and bi-color quartz totaling 11.51 carats, certified by the International Colored Gemstone Association (ICA GemLab). Quartz is one of the most abundant and versatile minerals composed of silicon dioxide, and it comes in many varieties, including citrine (yellow) and smoky quartz (brown). Bi-color quartz forms through varying conditions of temperature and trace elements during crystal growth, resulting in fascinating color contrasts. These gems are popular for their affordability, durability (7 on Mohs hardness), and visually compelling appearance, making them versatile for both casual and formal jewelry.