Pentagonite is a dimorph of cavansite. Though extremely similar, Pentagonite is significantly more rare. Pentagonite tends to have better color, pointed ends, and can grow in long, branch-like formations.
This exceptional specimen features vibrant pentagonite crystals gracefully perched on a soft, contrasting chalcedony matrix. The sharp, radiating crystal habit of the pentagonite is beautifully accentuated by the smooth, microcrystalline chalcedony, creating a striking balance between geometric precision and organic texture. Pieces combining both minerals in strong aesthetic harmony are highly sought after, making this specimen a standout example of a rare zeolite association.
Pentagonite is considered one of the rarest members of the zeolite group, and well-crystallized examples such as this are seldom available on the collector market. The presence of chalcedony not only enhances visual appeal but also provides a stable, elegant matrix that highlights the pentagonite’s form and color.
Dimensions: 2.5”x1.5”x1.25”
Weight: 74g
Pentagonite – CaAl₂Si₇O₁₈·7H₂O
A rare calcium aluminum silicate zeolite known for its distinctive five-sided crystal symmetry and scarcity.
Chalcedony – SiO₂
A microcrystalline variety of quartz, prized for its smooth luster and durability, often forming attractive matrix material for rare mineral species.
Pentagonite is famously limited in occurrence, with classic specimens primarily originating from India. Its rarity, combined with fragile crystal habits, makes intact and well-presented examples increasingly difficult to acquire. The addition of chalcedony elevates this piece beyond a single-species specimen, offering both mineralogical interest and visual sophistication suitable for advanced collections.
Rare pentagonite crystals with excellent definition
Attractive chalcedony matrix providing contrast and stability
Scarce zeolite species rarely seen in fine condition
Strong aesthetic balance between crystal form and matrix
Ideal specimen for serious zeolite or rarity-focused collections
Pentagonite has long been regarded as a quiet blue trophy mineral among knowledgeable collectors due to its extreme rarity and limited historic production. As fewer quality specimens enter the market and existing examples move into permanent collections, demand continues to outpace supply. Well-composed association pieces—particularly those with visually appealing matrices like chalcedony—are especially desirable and may offer long-term appreciation potential within the fine mineral market.
Pentagonite is a dimorph of cavansite. Though extremely similar, Pentagonite is significantly more rare. Pentagonite tends to have better color, pointed ends, and can grow in long, branch-like formations.
This exceptional specimen features vibrant pentagonite crystals gracefully perched on a soft, contrasting chalcedony matrix. The sharp, radiating crystal habit of the pentagonite is beautifully accentuated by the smooth, microcrystalline chalcedony, creating a striking balance between geometric precision and organic texture. Pieces combining both minerals in strong aesthetic harmony are highly sought after, making this specimen a standout example of a rare zeolite association.
Pentagonite is considered one of the rarest members of the zeolite group, and well-crystallized examples such as this are seldom available on the collector market. The presence of chalcedony not only enhances visual appeal but also provides a stable, elegant matrix that highlights the pentagonite’s form and color.
Dimensions: 2.5”x1.5”x1.25”
Weight: 74g
Pentagonite – CaAl₂Si₇O₁₈·7H₂O
A rare calcium aluminum silicate zeolite known for its distinctive five-sided crystal symmetry and scarcity.
Chalcedony – SiO₂
A microcrystalline variety of quartz, prized for its smooth luster and durability, often forming attractive matrix material for rare mineral species.
Pentagonite is famously limited in occurrence, with classic specimens primarily originating from India. Its rarity, combined with fragile crystal habits, makes intact and well-presented examples increasingly difficult to acquire. The addition of chalcedony elevates this piece beyond a single-species specimen, offering both mineralogical interest and visual sophistication suitable for advanced collections.
Rare pentagonite crystals with excellent definition
Attractive chalcedony matrix providing contrast and stability
Scarce zeolite species rarely seen in fine condition
Strong aesthetic balance between crystal form and matrix
Ideal specimen for serious zeolite or rarity-focused collections
Pentagonite has long been regarded as a quiet blue trophy mineral among knowledgeable collectors due to its extreme rarity and limited historic production. As fewer quality specimens enter the market and existing examples move into permanent collections, demand continues to outpace supply. Well-composed association pieces—particularly those with visually appealing matrices like chalcedony—are especially desirable and may offer long-term appreciation potential within the fine mineral market.
