Small Fermentation Tube, Borosilicate Glass Chemical_Gram Stain Four-piece earth-layer specimen set pairs

Four-piece earth-layer specimen set pairs granite and basalt with olivine and peridotite for crust-to-mantle comparative petrology teaching

Relict xenocrysts in sample record the direction of stress during alteration

the optically worked beveled edges widening the visible lateral shift in refraction-angle demos

5% phenolphthalein indicator solution

supporting orthodontic and occlusal anatomy teaching

Small Fermentation Tube, Borosilicate Glass Chemical_Gram Stain Four-piece earth-layer specimen set pairsSmall fermentation tube in borosilicate glass without foot supports yeast respiration experiments and biology fermentation investigations.