Five crystals under a polarised light microscope science greetings cards
These crystal greetings cards are interesting and unusual cards, great for men, scientists or anyone interested in the world around us.
Cards come with a description of the image on the back.
Crystals were viewed by polarised light microscopy and the images are of (clockwise from top left):
Vitamin C (Ascorbic acid) crystals;
Citric acid crystals;
Thin paper tissue (the crystalline structure of cellulose in the paper fibres give the colours);
Vitamin C (Ascorbic acid) crystals.
Cards are 150mm (6 inch) square, blank inside and each card is individually packed with a white envelope in a cellophane bag to ensure they are in great condition when you come to use them.
Free UK delivery (Delivery charges for overseas orders are calculated in the shopping basket). Please note that in order to offer you the lowest possible price these cards may be sent separately from any other items you order.