Kämmererite (Chromian Clinochlore) – World-Class Giant Crystals with Exceptional Magenta-Purple Color

Ex David Lucas ex collection of Günther Hoppe An extraordinary and historically important Kämmererite (chromian clinochlore) from the celebrated Kop Krom Mine, Erzurum Province, Türkiye, displaying exceptionally large crystals, superb color, and an imposing sculptural composition. By the standards of the species, this is an elite, world-class specimen, representing the caliber for which the finest Turkish Kämmererites have become legendary among advanced mineral collectors. The specimen is dominated by numerous exceptionally large, sharply developed Kämmererite crystals distributed across a tall, dramatically proportioned matrix. Several of the principal crystals reach remarkable size for the species, standing prominently above the underlying druse rather than occurring merely as the small flakes and micaceous aggregates more typical of chromian clinochlore. Their abundance and scale give the specimen extraordinary visual authority. Color is outstanding. The piece displays an intensely saturated palette ranging from rich raspberry and magenta through royal purple to deep wine-purple and nearly blackish plum in the thickest crystals. Strong illumination reveals brilliant crimson-magenta transmission through crystal edges and thinner portions, producing flashes of almost jewel-like color against the darker faces. The underlying matrix is itself extensively coated in vivid purple Kämmererite, creating an unusually complete and coherent color presentation. The crystals exhibit excellent pearly to vitreous luster, with broad reflective faces and pronounced crystallographic striations. Many of the larger crystals possess thick, pseudohexagonal to tabular forms, while others develop complex stepped and intergrown habits. Their sharply reflective surfaces contrast beautifully with the fine-grained, sparkling purple druse beneath them. Compositionally, the specimen is exceptional. The matrix rises in a dramatic, almost mountain-like formation, narrowing toward the summit and creating a natural progression of crystals from the broad lower portion to the elevated crown. Large crystals are distributed throughout the face rather than concentrated in only one area, giving the specimen numerous focal points while retaining a remarkably harmonious overall structure. Particularly substantial crystals across the middle and lower sections anchor the composition, while prominent crystals toward the summit draw the eye upward. Kämmererite is the chromium-rich variety of clinochlore, a member of the chlorite group. The chromium responsible for its celebrated purple-red coloration also makes fine crystallized material substantially more unusual than ordinary clinochlore. Although Kämmererite is known mineralogically from several occurrences, Türkiye has historically produced essentially the benchmark collector-quality crystallized specimens, with the Kop Krom deposits responsible for many of the great examples by which the species is judged. This specimen originates from the important 1970s Turkish production, an era associated with some of the finest Kämmererite specimens ever recovered. Large, well-developed crystals are particularly difficult to obtain for this species, making the combination here of exceptional crystal size, abundance, saturation, luster, and matrix coverage highly significant. Adding substantially to its pedigree is distinguished collection history: the specimen is ex David Lucas and ex collection of Günther Hoppe. Such provenance is particularly meaningful for a specimen of this caliber, documenting its passage through established mineral collections and complementing its historic Turkish origin. A truly exceptional Kämmererite displaying the qualities sought at the highest level of species collecting: very large crystals for the species, extraordinary magenta-purple saturation, excellent luster, abundant crystallization, commanding matrix aesthetics, classic 1970s Kop Krom provenance, and distinguished former ownership. This is not simply a fine representative of Kämmererite, but a specimen that belongs in the conversation among the world's premier examples of the species.