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åç: Rob Lavinsky, iRocks.com / Wikimedia Commons
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åç: Rob Lavinsky, iRocks.com / Wikimedia Commons## Featured Specimens
Search for specimens: View all rosasite specimens from Ojuela Mine, Mexico
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Ojuela rosasite is still available on the market, but top-quality pieces are not abundant. Modest thumbnails and small vug sections appear regularly; fine small cabinets and dramatic calcite combinations are more selective purchases. A recent public auction example, described as an early-2000s Ojuela rosasite with velvety deep teal-green botryoids lining multiple limonitic vugs, closed at $370 in January 2026. More ordinary small cabinets can sell for lower prices, while exceptional older pieces, large saturated displays, and unusually aesthetic calcite combinations bring stronger competition.
The main authenticity issue is not a widely documented rosasite-faking problem, but the broader Ojuela color problem. Around 2020, vivid âblue hemimorphiteâ attributed to Ojuela became controversial after testing identified Phthalocyanine Blue BN, a synthetic organic pigment, as the source of the color on analyzed specimens. This matters to rosasite collectors because Ojuela rosasite, aurichalcite, and hemimorphite can appear together in the same dealer trays, and inexperienced buyers may confuse naturally blue-green rosasite with artificially colored hemimorphite. Strong blue color alone is not proof of rosasite; habit and testing matter.
Misidentification is common at the casual level. Ojuela rosasite may be confused with aurichalcite, malachite, chrysocolla, or blue-green hemimorphite. Rosasite usually forms denser botryoidal or spherical aggregates with a velvety acicular surface, while aurichalcite more often appears as paler, delicate sprays or mats of fine needles. Malachite tends toward richer emerald to dark green and has different optical character; chrysocolla is typically more amorphous and waxy. In mixed Ojuela pieces, more than one blue-green mineral may be present, so a label reading ârosasiteâ should not be taken as the whole mineral inventory.
Condition requires close inspection. The iron-oxide matrix can be friable, and vug edges often shed grains. Botryoidal rosasite bruises easily; high points may be flattened or dulled from handling. Fine acicular surfaces trap dust but should not be aggressively cleaned. Avoid ultrasonic cleaning, acids, and prolonged soaking. Use only gentle air, a very soft brush, and careful mechanical handling. Specimens with aurichalcite or delicate calcite associations need especially conservative care.
Stabilization and repairs are not unusual in specimens from old oxidized mines, but they should be disclosed. A small amount of matrix consolidation may be acceptable for a fragile gossan specimen if honestly represented; undisclosed gluing, recoloring, or rebuilding is not. When buying better Ojuela rosasite, ask whether the piece has been repaired, stabilized, or coated, and examine under magnification for glossy consolidant films, unnatural color pooling, or broken botryoids with fresh interiors.## ã¹ããŒãªãŒãºãšãã£ãŒã«ãããŒã
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âRosasite with Calcite - Ojuela mine,â Barnebys / Catawiki lot page â Auction-media listing for a blue rosasite and calcite-blade specimen, with a linked Vimeo specimen video.
âRosasite, Aurichalcite - Mine dâOjuela, MapimÃ, Durango, Mexique,â Barnebys lot page â Short media-linked listing showing a rosasite-and-aurichalcite specimen from Ojuela.
âAdamite (variety Cu-bearing adamite) from Ojuela Mine, MapimÃ, Mexico,â Fabre Minerals on Vimeo â Not rosasite, but a useful visual reference for Ojuela limonite matrix, oxidized-zone aesthetics, and associated collector material.## ãããªãèªã¿ç©ãšå€éšãªã³ã¯
Mindat: Rosasite from Ojuela Mine â çºçå Žæãé¢é£é±ç©ãåèæç®ãåçããŒã¹ã®é¢é£ããŒã¿ã®æè¯ã®åäžããŒã¿ããŒã¹ããŒãžã
Mindat: Ojuela Mine locality page â é±ç©ãªã¹ããé±åºãåèæç®ããµããã±ãŒã·ã§ã³ãå«ãå®å šãª locality ãã¬ãŒã ã¯ãŒã¯ã
Wikimedia Commons: Rosasite-rosa16a.jpg â ã«ã«ãµã€ãã䌎ãå€§èŠæš¡ãªãªããšã©ç£ Rosasite ã®å ¬éã©ã€ã»ã³ã¹åçïŒRob LavinskyïŒã
Wikimedia Commons: Rosasite-Calcite-278338.jpg â ã«ã«ãµã€ããšãšãã«ãã«ãããç¶ã®ãªããšã©ç£ Rosasite ã®ã¯ããŒãºã¢ããå ¬éã©ã€ã»ã³ã¹åçã
Rock & Gem: âDe Colores: Ojuela Mine, Durangoâ â è²åœ©è±ããªæè¿ã®çºèŠãæ·±ãéç·è²ã®ãããªãªã€ãç¶ Rosasite ã匷調ããããŒã¿ãŒã»ã¡ã¬ãŠã® locality æŠèŠã
Mineral Auctions: Ojuela rosasite auction example â 2000幎代åé ã® Ojuela rosasiteæšæ¬ãšäŸ¡æ Œå±¥æŽã®æçšãªæè¿ã®åžå Žåç §ã
Mineral Auctions: Calcite on Rosasite, ex Arnaud Collection â äŒçµ±ç㪠Ojuela ã® calcite-on-rosasite ã®çµã¿åããã®äŸã
Mindat discussion: âBlue Hemimorphite from Ojuela Mineâ â ãã¿ãã·ã¢ãã³ã»ãã«ãŒ BNæè²ããã¢ã«ãã¡ã€ãè«äºãèšé²ããéèŠãªã³ã¬ã¯ã¿ãŒèŠåã¹ã¬ããã
Minfind: Ojuela Mine locality article â äžçã®é±ç©å°æ¹ã®äžã§ã®ãªããšã©ã®å°äœã«ã€ããŠã®èŠç¹ãæããã³ã¬ã¯ã¿ãŒåãæŠèŠã
Mineral of the Month Club: Rosasite write-up, March 2017 â Ojuela ã®å°è³ªãæ¡æå²ãRosaites ã®ç¿æ§ã«é¢ããæçšãªããŒããå«ããã¢ã¯ã»ã¹ãããã皮㚠locality ã®è§£èª¬ã