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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! 
 
S6936 - Prehnite - $350 SOLD   
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 2.3 x 2 cm 
Collector Mineral Specimens of Prehnite for Sale from Mawaya Pit, Merelani Hills, Tanzania
This is as good of a prehnite tn as I have ever seen! It is transparent through the corners and 
internally gemmy forming a glow like effect! Looks like candy! Size is 2.3 x 2 cm, no damage. 
 
S6937 - Prehnite on Graphite - $475 SOLD 
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 4 x 3.3 cm  
Great well crystallized lustrous neon-yellow prehnites form an isolated cluster measuring 2.3 cm in 
length that rests on shiny dark gray graphite matrix of 4 x 3.3 cm in overall size, aesthetic shape 
from side too, in fine condition. 
 
S6938 - Prehnite on Graphite - $225  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3.4 x 2.3 cm  
Very fine well crystallized lustrous neon-yellow prehnite clusters up to 1.4 cm across completely cover 
a shiny dark gray graphite matrix of 3.4 x 2.3 cm in overall size, quite gemmy as photos show. 
 
S6939 - Prehnite on Graphite - $200 SOLD   
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3.8 x 3.1 cm  
Highly lustrous well crystallized neon-yellow prehnite clusters cover shiny dark gray graphite matrix of 
3.8 x 3.1 cm in overall size, gemmy throughout, appealing in hand. 
 
S6940 - Prehnite on Graphite - $175  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3 x 2.3 cm  
Good well crystallized lustrous neon-yellow prehnites form an isolated cluster measuring 1.1 cm in 
length that rests on shiny dark gray graphite matrix of 3 x 2.3 cm in overall size, nice toenail. 
 
S6941 - Prehnite on Graphite - $175  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3.4 x 2.5 cm  
Two larger clusters of well crystallized glassy neon-yellow prehnites of 2.3 cm in length sit up nicely 
on shiny dark gray graphite matrix attached to the back of this piece, size is 3.4 x 2.5 cm. Very fine 
small miniature. 
 
S6942 - Prehnite - $165  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3 x 2.4 cm  
Highly gemmy well crystallized lustrous neon-yellow cluster measuring 1.4 cm in length sits atop alike 
matrix of 3 x 2.4 cm in overall size, photographed looking down, so it has more depth from the side. 
 
S6943 - Prehnite on Graphite - $185  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3.2 x 2.2 cm  
Choice glassy well crystallized transparent neon-yellow clusters sit interconnected upon reflective 
dark gray graphite matrix of 3.2 x 2.2 cm in size, sharp high quality crystals. 
 
S6944 - Prehnite on Graphite - $185  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 2.3 x 2.2 cm  
Lustrous neon-yellow prehnites form a round cluster of 2 cm across that sits on shiny dark gray 
graphite matrix of 2.3 x 2.2 cm in overall size, neat thumbnail for Africa. 
 
S6945 - Prehnite on Graphite - $200  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3.5 x 1.7 cm  
Very good well crystallized lustrous neon-yellow prehnites completely cover a dark gray graphite 
matrix of 3.5 x 1.7 cm in overall size, a little lighter color, but nice shape. 
 
S6946 - Prehnite on Graphite - $200  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3.2 x 2.3 cm  
Nice well crystallized lustrous neon-yellow prehnites form a partially isolated cluster measuring 1.2 
cm in length that rests on shiny dark gray graphite matrix of 3.2 x 2.3 cm in overall size, gemmy! 
 
S6947 - Prehnite - $175  
Mawaya Pit, Merelani Hills, Tanzania  
Overall Size: 3.2 x 2.8 cm  
Well crystallized lustrous pale neon-yellow prehnites form isolated clusters up to 1 cm in length that 
rest upon alike matrix of 3.2 x 2.8 cm in overall size, sharp xtls for the mineral. 
 








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