First, be aware that it is illegal to deliberately mutilate, damage or alter coins of the realm, moreso for any resulting fraudulent activity like representing the coin as something it is not. I presume that you would like to cut the coin in such a manner that enables you to see both sides of the coin, rather than two semi-circles. You will need somebody with fine cutting tools such as a jeweller or somebody who cuts gem stones.
Use a 20p and a 2p and cut them in half
No, a 2p coin cannot scratch apatite. Apatite is composed of calcium phosphate minerals which are harder than the metal used in a 2p coin.
A 2p coin in the UK weighs approximately 7.12 grams.
Great Britain discontinued the 1/2p coin in 1984 The U.S. discontinued its 1/2¢ coin in 1857
no
0.44444
2.7 mm
not much really
No, a 2p coin is unlikely to scratch apatite and orthoclase as these minerals have a higher hardness on the Mohs scale compared to the coin. Apatite has a hardness of 5 on the Mohs scale, while orthoclase has a hardness of 6-6.5, higher than the 2p coin.
That makes it easier to distinguish them.
In British coinage the denominations lower than the 20p coin are the 10p, 5p, 2p, and 1p coins. There was also a half penny coin but this was withdrawn from circulation in 1984.
2p