Jelly Garnet

Jelly Garnet is an informal trade name for translucent grossular garnet that has a soft, glowing, almost gummy or jelly-like look. The name describes the optical effect rather than a distinct species — light scatters gently through the slightly cloudy stone, giving it a candy-like appearance.

Grossular is the calcium-aluminum member of the garnet group and occurs in many colors, including green, honey, peach, pink, and orange. Jelly Garnet usually refers to the more translucent, less transparent material that lapidaries cut into cabochons.

It is popular with carvers and cabochon cutters who value its even, glowing body color.

Grossular forms mainly through contact and regional metamorphism of impure, calcium-rich (calcareous) rocks, such as limestones and marls that have been altered by heat and fluids. It is a characteristic mineral of skarns — reaction zones where intrusions meet carbonate rocks.

Gem-quality and translucent grossular comes from places including Tanzania, Kenya, Pakistan, Mexico, Sri Lanka, and Canada (Quebec). The jelly-like, slightly included material forms where crystallization trapped fine inclusions or where the garnet grew with subtle internal cloudiness.

Jelly Garnet is translucent (not fully transparent), with a glowing internal body color and vitreous to slightly resinous luster.

• Hardness: 6.5-7.
• Streak: white.
• Optic character: singly refractive.
• Fracture: conchoidal, no cleavage.

Grossular often shows characteristic rounded inclusions and a slightly grainy interior under magnification. Distinguish green jelly grossular from jade by single refraction and higher refractive index; separate from chalcedony by its higher density and hardness.

Jelly Garnet is cut into cabochons, beads, and carvings, where its soft glow is most attractive, and clearer pieces are faceted. It appeals to collectors of grossular's many color varieties.

It is durable enough for most jewelry. As a garnet, it carries the general metaphysical associations of grounding and vitality, though these are not scientific claims.