I am an Indian by origin and currently a Canadian citizen. During my recent holiday visit to India, I purchased a Turquoise gemstone along with a certificate from a reputable seller. Now, as I prepare to return to Canada (Surrey, British Columbia), I have a layover at London Heathrow Airport before my final destination with Air Canada.

I would like to know if there are any specific regulations regarding carrying gemstones while traveling. Do I need to provide any supporting documents, such as an invoice, a bill, or an authenticity certificate from a particular lab, for immigration clearance? Also, since I have a layover in London, I am curious if there are any specific requirements or restrictions at Heathrow Airport regarding carrying gemstones.

Has anyone had a similar experience? Any guidance on the required documents at both London Heathrow and Canada for a smooth immigration process would be greatly appreciated.

Looking forward to helpful responses. Thank you!