amber
珀 centers on amber, the fossilized tree resin valued as a gemstone. Its meaning is specific to this material.
珀 combines 王 (jade, gem) with 白, which likely contributes the sound, to denote a gemstone—specifically amber.
The left side 王 (jade) suggests a precious stone, and the right side 白 (white) hints at the pale, translucent quality of amber. Together they make 珀, the gemstone amber.
For ハク, imagine a piece of amber being hacked from a larger fossilized resin block: hack -> ハク, and the gemstone is revealed.
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