sagenite

mineral

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Last updated

July 13, 2026

Quick Summary

Sagenite is a mineral composed of needle-like rutile crystals that form in a lattice-like pattern. These crystals are often found embedded within other minerals, such as quartz. The name "sagenite" comes from the Latin word sagena, meaning "large fishing net," which describes the reticulated (net-like) forms the rutile crystals can take.1

The term "sagenitic" is an adjective used to describe minerals that contain sagenite or similar needle-shaped crystals, particularly when referring to quartz.2

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rutile
…rutile in quartz are called sagenite (from the Greek word for “net”). Hairlike crystals of rutile not included in quartz are rare; the quartz crystals mechanically enclose the rutile during growth. Most fine-quality rutilated quartz comes from Minas Gerais, Brazil; Madagascar; Hanover, New Hampshire; and northern Vermont.
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…rutile in quartz are called sagenite (from the Greek word for “net”). Hairlike crystals of rutile not included in quartz are rare; the quartz crystals mechanically enclose the rutile during growth. Most fine-quality rutilated quartz comes from Minas Gerais, Brazil; Madagascar; Hanover, New Hampshire; and northern Vermont.
Read More