1.70 ct PECTOLITE – INDIA

Pectolite Pectolite is a mineral that often catches collectors by surprise with its dual personality. In its common form, it appears as sharp, white acicular sprays that are notoriously "stinging" to the touch, as the tiny needles can easily pierce the skin. However, when it takes on its rare, translucent blue form—known as Larimar—it becomes one of the most sought-after ornamental stones in the world. I have always found the structure of Pectolite to be fascinating; it is a silicate that forms in radiating globular masses, creating a texture that looks like frozen silk. Whether you are looking at a snow-white "hedgehog" of crystals or a polished piece of volcanic blue, Pectolite represents the incredible variety that a single mineral species can exhibit. The Heritage & Discovery Historical Significance: Pectolite is a primary member of the wollastonite group and is an important indicator of hydrothermal activity in basaltic rocks. Historically, it has been studied for its unique chain-silicate structure. While the white variety has been a staple of mineral cabinets for nearly two centuries, the discovery of the copper-rich blue variety in the 1970s revolutionized its status, moving it from a specialized mineralogical specimen to a high-end gemstone and decorative material. Discovery: The mineral was first described in 1828 by Franz von Kobell. He derived the name from the Greek word pektos, meaning "compacted" or "put together," referring to its characteristic dense, radiating habit. It was initially identified in the volcanic regions of Italy, where it remains a classic find for those exploring the secondary minerals of basalt. Important Mines: The most famous source for "standard" Pectolite is the Paterson area in New Jersey, USA, known for its world-class zeolites and associated minerals. However, for the prized blue variety, Larimar, there is only one source on Earth: the Filipinas Mine in Los Chupaderos, Dominican Republic. Additionally, the Kola Peninsula in Russia produces massive, translucent specimens that are often used for high-end carving and mineralogical study. Mineralogical Profile Description: Pectolite is a sodium calcium silicate hydroxide that crystallizes in the triclinic system. It sits at a 4.5 to 5 on the Mohs scale, making it relatively soft but durable enough for carvings and cabochons. It is characterized by its radiating acicular (needle-like) habit and a vitreous to silky luster. Because of its perfect cleavage in two directions, the mineral is quite brittle. When the stone contains traces of copper, it displays the famous Caribbean-blue color of Larimar, which is often patterned with white "sea-foam" streaks caused by the way the fibrous crystals intersect. Chemical Formula: NaCa₂Si₃O₈(OH)