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Thailand celebrates many holidays. GemSelect ships orders from Monday to Friday.

Orders received on Thai holidays are processed the following business day.
*Please note that Thai holidays change yearly. This list has been updated for 2018.

Thai Holidays
New Year's Day January 1-2
Maka Bucha Day March 1
Chakri Memorial Day April 6
Songkran Festival Holiday (Thai New Year) April 13-17
Labor Day May 1
Royal Ploughing Ceremony Day May 14
Visakha Bucha Day May 29
Asanha Bucha Day July 27
Substitution for H. M. King Vajiralongkorn's Birthday July 30
Substitution for H.M. Queen's Birthday (Mother's Day) August 13
Substitution for H. M. King Bhumipon Memorial Day October 15
Chulalongkorn Memorial Day October 23
H.M. King Bhumipon's Birthday (Father's Day) December 5
Constitution Day December 10
New Year's Eve December 31
  • First Published: February-20-2006
  • Last Updated: January-26-2018
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    Reproduction (text or graphics) without the express written consent of GemSelect.com (SETT Company Ltd.) is strictly prohibited.
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Size and Weight

Gems are always measured in Millimeter (mm)

Dimensions are given as;
length x width x depth,
except for round stones which are;
diameter x depth

Select gems by size, not by weight!
Gem varieties vary in density, so carat weight is not a good indication of size

Note: 1ct = 0.2g

Size Comparison Chart