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New find! These neon-yellow prehnites have a gemlike appearance that I cannot recall seeing better 
from any other source. All specimens are highly glassy as well as transparent in areas showing the 
graphite matrix underneath! This isn't surprising as many species from the tanzanite mines reach top 
quality when compared worldwide. Most are in excellent condition with lively color that is accurately 
illustrated in the photos. Merelani has always been sporadic so take advantage of a rare opportunity! 
 
S6924 - Prehnite on Graphite - SOLD  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 5.5 x 4.2 cm 
Collector Mineral Specimens of Prehnite for Sale from Mawaya Pit, Merelani Hills, Tanzania
Very fine well crystallized lustrous neon-yellow prehnites completely cover a shiny dark gray graphite 
matrix of 5.5 x 4.2 cm in overall size, excellent shape, quality, and consistent gem look throughout! 
No damage, just a killer miniature! 
 
S6925 - Prehnite on Graphite - $250 SOLD   
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3.3 x 2.7 cm  
Choice glassy well crystallized gemmy neon-yellow clusters up to 1.5 cm in length sit upon reflective 
dark gray graphite matrix of 3.3 x 2.7 cm in size, back is all prehnite, so it looks good from either 
side, in super condition. 
 
S6927 - Prehnite on Graphite - $350 SOLD  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3.5 x 3.5 cm  
Very fine well crystallized lustrous neon-yellow prehnite clusters up to 1.7 cm across completely cover 
a shiny dark gray graphite matrix of 3.5 x 3.5 cm in overall size, quite transparent with good depth of 
main spray. 
 
S6928 - Prehnite on Graphite - $200  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3 x 2.2 cm  
Fine well crystallized lustrous neon-yellow prehnites form a main cluster of 2 cm across, nice shiny 
dark gray graphite is attached on this piece of 3 x 2.2 cm in overall size, small contacts in the 
middle - light yellow in photos. 
 
S6929 - Prehnite on Graphite - $200 SOLD   
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3.5 x 2.5 cm  
Glassy well crystallized gemmy neon-yellow clusters up to 1.2 cm in length sit upon reflective dark 
gray graphite matrix of 3.5 x 2.5 cm in size, lighter color, but aesthetic shape. 
 
S6930 - Prehnite - $275 SOLD   
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 2 x 2 cm  
Top notch thumbnail! Lustrous single cluster of 2 x 2 cm in overall size has both the aesthetic round 
shape and neon-yellow color, one tiny bruise that could be the display base, a truly fine tn! 
 
S6931 - Prehnite on Graphite - $225  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3.2 x 3 cm  
Highly lustrous well crystallized neon-yellow prehnite clusters up to 1.5 cm across almost completely 
cover a shiny dark gray graphite matrix of 3.2 x 3 cm in overall size, quite transparent with good 
depth of main xtl group, attractive! 
 
S6933 - Prehnite on Graphite - $200  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3.5 x 2.5 cm  
Glassy well crystallized neon-yellow prehnite clusters up to 1.3 cm across completely cover a shiny 
dark gray graphite matrix of 3.5 x 2.5 cm in overall size, pretty mineral without damage. 
 
S6934 - Prehnite - $200 SOLD    
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 2.3 x 1.7 cm  
Gemmy well crystallized lustrous neon-yellow cluster measuring 1.6 cm in length sits atop alike matrix 
of 2.3 x 1.7 cm in overall size, super thumbnail, no problems. 
 
S6935 - Prehnite on Graphite - $200  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3.3 x 2.5 cm  
Very good well crystallized lustrous neon-yellow prehnites form an isolated cluster measuring 1.5 cm in 
length that rests on shiny dark gray graphite matrix of 3.3 x 2.5 cm in overall size, no damage. 
 








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