Stasia Paszkiewicz
Graduate Gemologist (G.I.A.)
Logo Central Florida Certified Jewelry Appraisal

Stasia Paszkiewicz G.G.

Graduate Gemologist (G.I.A.)

CERTIFIED JEWELRY APPRAISAL
Senior Member, National Association of Jewelry Appraisers

Come to Us or We Come to You · Appraisals are Independent, Unbiased and Detailed · For Insurance Replacement, Estate, Divorce & More
Appraisals While You Watch · Mobile Lab Serving Lake, Sumter & All Central Florida

(352) 589-7655 · gemappraisals@gmail.com


 
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Gem Care

Care and Durability Factors by The Gem Reference Guide, Published by the Gemological Institute of America


JANUARY – Garnet

Hardness: 7 to 7 ½

Cleaning Methods:

  • Ultrasonic: Usually Safe

  • Steamer: Never

  • Warm Soapy Water: Safe

Stability:

  • Reaction to Heat: Abrupt temperature changes likely to cause fracturing

  • Stability to Light: Stable

  • Reaction to Chemicals: Virtually none, very slightly attacked by concentrated hydrofluoric acid.

Garnet - Gem Care

FEBRUARY – Amethyst

Hardness: 7

Cleaning Methods:

  • Ultrasonic: Usually Safe

  • Steamer: Risky

  • Warm Soapy Water: Safe

Stability:

  • Reaction To Heat: Strong Heat Turns Stone Colorless, Or May Produce A Citrine Or Green Color; However, Gentle Heating May Lighten The Color. Abrupt Temperature Change May Fracture Stone.

  • Stability To Light: Some Stones May Fade

  • Reaction To Chemicals: Soluble In Hydrofluoric Acid And Ammonium Floride; Very Slightly Soluble In Alkalies.

Amethyst - Gem Care

MARCH – Aquamarine

Hardness: 7 ½ To 8

Cleaning Methods:

  • Ultrasonic: Usually Safe, Unless Stone Contains Feathers Or Liquid Inclusions

  • Steamer: Usually Safe, Unless Stone Contains Feathers Or Liquid Inclusions

  • Warm Soapy Water: Safe

Stability:

  • Reaction To Heat: Generally Not Heat Sensitive Unless Contains Liquid Inclusions

  • Stability To Light: Stable

  • Reaction To Chemicals: Attacked By Hydrofluoric Acid

Aquamarine - Gem Care

APRIL – Diamond

Hardness: 10

Cleaning Methods:

  • Ultrasonic: Usually Safe, Unless Contains Feathers

  • Steamer: Usually Safe, Unless Contains Feathers

  • Warm Soapy Water: Safe

Stability:

  • Reaction To Heat: Begins To Vaporize In Oxygen-Rich Atmosphere At 690 C To 875 C

  • Stability To Light: Stable

  • Reaction To Chemicals: None

Diamond - Gem Care

MAY – Emerald

Hardness: 7 ½ To 8

Cleaning Methods:

  • Ultrasonic: Never

  • Steamer: Never

  • Warm Soapy Water: Generally Safe, But Avoid Strong Detergents And Vigorous Scrubbing On Oiled Stones

Stability:

  • Reaction To Heat: May Cause Additional Fracturing Or Compete Breakage

  • Stability To Light: Stable, Except Possible Fading In Stones Treated With Green Oil

  • Reaction To Chemicals: Resistant To All Acids Except Hydrofluoric; Solvents May Drive Out Oil

Emerald - Gem Care

JUNE – Pearl

Hardness: 2 ½ To 4

Cleaning Methods:

  • Ultrasonic: Never

  • Steamer: Never

  • Wipe With Very Soft Cloth After Each Wearing

  • Warm Soapy Water: Safe For More Thorough Cleaning (If Strung, Be Sure String Is Completely Dry Before Wearing)

Stability:

  • Reaction To Heat: Excessive Heat, Such As Open Flame, May Cause Pearls To Burn, Turn Brown, Split, Or Crack.

  • Stability To Light: Stable

  • Reaction To Chemicals: Attacked By All Acids; Acid Perspiration, Perfume, Or Hairspray Also Attacks Nacre

Pearl - Gem Care

JULY – Ruby

Hardness: 9

Cleaning Methods:

  • Ultrasonic: Usually Safe, But Never For Oiled Stones

  • Steamer: Usually Safe, But Never For Oiled Stones

  • Warm Soapy Water: Safe, But Avoid Strong Detergents And Vigorous Scrubbing On Oiled Stones

Stability:

  • Reaction To Heat: Sometimes Improves Color

  • Stability To Light: Stable

  • Reaction To Chemicals: Attacked With Difficulty

Ruby - Gem Care

AUGUST – Peridot

Hardness: 6 ½ To 7

Cleaning Methods:

  • Ultrasonic: Risky

  • Steamer: Never

  • Warm Soapy Water: Safe

Stability:

  • Reaction To Heat: Uneven Or Rapid Heat May Cause Fracturing Or Complete Breakage

  • Stability To Light: Stable

  • Reaction To Chemicals: Acid Perspiration Of Some People May Attack Over A Long Period Of Time.

Peridot - Gem Care

SEPTEMBER – Sapphire

Hardness: 9

Cleaning Methods:

  • Ultrasonic: Usually Safe

  • Steamer: Usually Safe

  • Warm Soapy Water: Safe

Stability:

  • Reaction To Heat: Sometimes Improves Color, But May Cause Loss Of Color

  • Stability To Light: Stable, Except For Irradiated Yellow And Orange Sapphires

  • Reaction To Chemicals: Attacked With Difficulty

Sapphire - Gem Care

OCTOBER – Opal

Hardness: 5 To 6 ½

Cleaning Methods:

  • Ultrasonic: Never

  • Steamer: Never

  • Warm Soapy Water: Safe

Stability:

  • Reaction To Heat: Sudden Changes In Temperature May Cause Opals To Crack, Craze, Or Fracture; Overheating Will Turn Most Opals White Or Brownish, And Play-Of-Color Will Disappear

  • Stability To Light: Stable

  • Reaction To Chemicals: Attacked By Hydrofluoric Acid And Caustic Alkalies

Opal - Gem Care

NOVEMBER – Topaz

Hardness: 8

Cleaning Methods:

  • Ultrasonic: Never

  • Steamer: Never

  • Warm Soapy Water: Safe

Stability:

  • Reaction To Heat: Rapid Heating Or Cooling Will Cause Internal Breaks; Strong Heat May Alter Or Destroy Color

  • Stability To Light: Some Brown Stones Fade

  • Reaction To Chemicals: Affected Very Slightly

Topaz - Gem Care

DECEMBER – Tanzanite

Hardness: 6 To 7

Cleaning Methods:

  • Ultrasonic: Never

  • Steamer: Never

  • Warm Soapy Water: Safe

Stability:

  • Reaction To Heat: Fuses Under Jewelers Torch; Sudden Temperature Changes (Heating Or Cooling) May Cause Cracking

  • Stability To Light: Stable

  • Reaction To Chemicals: Attacked By Hydrochloric And Hydrofluoric Acid 

Tanzanite - Gem Care