Skip to Content
Analysis & grading
Analysis & Grading Home
Submit A Gem
Online services application
Programmes and Certificates
Financial Assistance & Scholarships
Research & News
Research & News Home
News & Articles
Gems & Gemology Journal
About GIA Home
GemKids for Educators
Mission & Governance
Frequently asked questions
Analysis & grading
What are black diamonds?
What cut proportions are best for a fancy colour diamond?
When does yellow become a positive colour factor?
When is a coloured diamond a “fancy colour diamond”?
Why are there two kinds of GIA coloured diamond reports?
Are dark veins in turquoise good or bad?
Are emeralds from Colombia worth more?
Are origins like “Santa Maria” important to the value of aquamarines?
Are sapphires from Kashmir, Burma or Ceylon worth more?
Are there sunstone imitations?
Can I buy an untreated emerald?
Could a dinosaur be cloned from a mosquito found in amber?
Does a horsetail inclusion guarantee Russian origin?
Does GIA grade alexandrites?
Does GIA grade aquamarine?
Does GIA grade emeralds?
Does GIA grade iolite?
Does GIA grade kunzite?
Does GIA grade lapis lazuli?
Does GIA grade morganite?
Does GIA grade opal?
Does GIA grade rose quartz?
Does GIA grade rubies?
Does GIA grade spinels?
Does GIA grade sunstone?
Does GIA grade tanzanite?
Does GIA grade topaz?
Does GIA grade tourmalines?
Does GIA grade zircon?
Does GIA indicate whether an alexandrite is from Russia on the report?
Does GIA offer reports for amethyst?
Does GIA offer reports for ametrine?
Does GIA offer reports for citrine?
Does heat treatment affect the value of ruby?
Does it matter if turquoise is blue or green?
Does it matter where an amethyst is mined?
Does jade come in pink and blue?
Does the type of filler in an emerald’s fractures matter?
How can I judge citrine’s quality?
How does heat treatment affect a sapphire’s value?
How does lattice diffusion affect a sapphire’s value?
How do I know if a blue spinel has cobalt in it?
How do I know if a topaz is “Imperial topaz”?
How do I know that a sapphire is a real padparadscha?
How do I know that the spinel I’m buying is natural?
How do I know whether my tourmaline is from Paraíba?
How do I tell what type an individual zircon is?
How much is my emerald worth?
I have a moonstone that’s scratched: can it be fixed?
Is a Burma ruby worth more?
Is amber perfume made from amber?
Is any colour of zircon a birthstone for December?
Is aquavit made from amber?
Is Baltic amber worth more than amber from other places?
Is blue topaz radioactive?
Is citrine treated?
Is faceted moonstone available?
Is it OK to have an amethyst engagement ring?
Is jadeite from Burma banned in the United States?
Is lapis enhanced?
Is lapis lazuli imitated?
Is moonstone tough enough for rings?
Is morganite enhanced?
Is morganite produced synthetically?
Is morganite “pink emerald”?
Is opal durable enough for rings?
Is opal from Lightning Ridge worth more?
Is Persian turquoise more valuable?
Is pink topaz from Pakistan or Brazil more valuable?
Is predominately blue tanzanite rarer than violet?
Is rainbow moonstone really moonstone?
Is rose quartz enhanced?
Is sunstone colour-enhanced?
Is tanzanite tough enough for rings?
Is there a red garnet the colour of ruby?
Is there really only one source for ametrine?
Is there such a thing as pink or green tanzanite?
Is there synthetic citrine?
Is tourmaline from Paraíba worth more?
Is zircon radioactive?
I understand iolite cleaves. Is it tough enough for rings?
I’ve seen peridot marketed as “unheated”. Does that make it more valuable?
My amber is darker than it used to be. Does that mean it isn’t real?
Should I be looking for a peridot from Myanmar, Pakistan or Egypt?
Should I store my opal in water?
What's the difference between the two green garnets: tsavorite and demantoid?
What are lattice diffusion sapphires?
What does heat treated mean?
What is AAA aquamarine?
What is AAA peridot?
What is AAA quality ametrine?
What is AAA quality kunzite?
What is a “created” emerald?
What is the best colour for lapis?
What is the best colour of morganite?
What is the best colour of rose quartz?
What is the best sunstone colour?
What is the Block Burmese JADE Act of 2008?
What is the most valuable inclusion in amber?
What is “B” jade?
What’s AAA-quality amethyst?
What’s AAA-quality garnet?
What’s AAA-quality spinel?
What’s AAA-quality tanzanite?
What’s an “alexandrite sapphire”?
What’s a “created” alexandrite?
What’s a “created” ruby?
Where does the best kunzite come from?
Which tourmaline colour is best?
Why are jade bangles so small?
Why are there such large price differences for turquoise that looks similar?
Why does aquamarine cost so much more than blue topaz, which is almost the same colour?
Why don't the aquamarine side stones in my ring match the centre stone?
Why isn’t iolite as popular as tanzanite?
Are diamonds with a higher number of facets brighter?
Does GIA grade diamond cut?
Does GIA grade synthetic diamonds?
Does the ultraviolet component of the light used for grading affect the colour grade of the diamond?
How can I be sure that a diamond is conflict free?
How can I be sure that a GIA grading report is authentic?
How do I get a GIA grading report?
I have found a clear, colourless stone that I think may be a diamond because it scratches glass. How can I find out for sure?
What is ultraviolet fluorescence?
Will GIA appraise my diamond?
I have a strand of pearls that shows too much string. Can it be fixed?
Should a strand of Tahitian pearls be black to be valuable?
What are “chocolate pearls”?
What is the difference between natural and cultured pearls?
What’s a Majorca “Pearl”?
Where are freshwater pearls found?
Why are freshwater pearls so much less expensive than Akoya or South Sea cultured pearls?
Why do pearl strands have knots between each pearl?
What is the difference between treatment and enhancement and what are they?
Can anyone access the library?
Do I have to call ahead before visiting the museum?
How can I find a retailer who sells diamonds with GIA grading reports?
What is My GIA?
GIA Logo Usage
Can I use the GIA logo on my website, business card or other promotional materials?
What is GIA's position on the Kimberley Process Certification Scheme?
Does GIA have a wholesale price list or information about dealers or suppliers?
How do I start an alumni chapter in my area?
How can I locate a GIA graduate or verify that a jeweller is a GIA graduate?
I am a GIA graduate. How do I properly list my credentials on business cards and other materials?
Coloured Diamond Reports
How does GIA grade coloured diamonds?
How does the coloured diamond grading system differ from the D-to-Z diamond grading system?
Coloured Stone Reports
Can I submit a mounted coloured stone for analysis?
Does GIA grade sapphires?
How does GIA test coloured stones?
On a Laboratory report for a treated emerald, what do F1, F2 and F3 mean?
What types of stones qualify for country-of-origin reports?
Why doesn't GIA issue grading reports for coloured stones?
What is the GIA Facetware Cut Estimator?
Does GIA certify or appraise diamonds and other gemstones?
Do you grade branded speciality cuts?
Do you grade filled diamonds?
How does GIA grade D to Z diamonds?
How is diamond carat weight rounded?
Is there a cut grading system for fancy shaped diamonds?
What kind of information is on a GIA diamond report and what does it mean?
Why does a diamond have to be loose for the Diamond Grading Report and Coloured Diamond Grading Report?
What is the GemPass Redemption Programme?
Are my gemstones insured while they are in the lab?
Can I order a rush service for items submitted for analysis and grading?
Can someone other than me to pick up my items once the servicing is complete?
Does GIA unmount and remount stones?
Do you translate your grading reports into other languages?
How do I change my current GIA report format into another GIA report format?
How do I know I will get the same gemstones back?
How do I replace a lost, stolen or destroyed GIA report?
Can I put multiple pearls or items on one pearl report?
How does the GIA Pearl Classification Report address nacre thickness?
What does “Predominantly” mean on a pearl report?
What if I don’t want or need every pearl in a group or item tested?
What pearl grading system does GIA use?
Why would you X-ray pearls and how does GIA do it?
How can I verify multiple reports or download multiple report PDFs at once?
What is Report Check Plus?
Why have you changed your Report Check log in?
Can I use my FedEx account to return my item?
Do I need an appointment to submit my items in person?
How can I add or remove an authorised representative to my GIA account?
How can I get a copy of my invoice, view my account balance or make a payment?
How can I update the contact information on my GIA account?
How do I open a laboratory account?
How do I pay for analysis and grading services?
How often do I need to update my Client Agreement?
What if I suspect gem material I'm submitting has been treated or is a product of gem synthesis?
What is GIA LabDirect?
Which analysis and grading services are offered at each laboratory location?
Synthetic Diamond Reports
How does GIA grade synthetic diamonds?
Why does GIA provide fewer grade categories for colour and clarity for synthetic diamonds?
What treatments does GIA test for?
Am I required to take either my lab class or eLearning classes in a certain order?
Do I have to go to a GIA campus to take my exams?
How does GIA’s gem lending system work?
What is the deadline for enrolling in eLearning?
What is the difference between a GIA lab class and the Student Workroom?
Where can I get the instruments needed to complete the Gem Identification eLearning course?
Financial Assistance & Scholarships
Can I use my financial aid funds for living expenses as well as tuition?
How do I receive my financial aid funds to pay for my educational expenses?
How soon after I submit my financial aid application will I hear from GIA about my eligibility?
I am a veteran of the United States Armed Services. Can I use my GI Bill benefits to attend GIA?
I am eligible for vocational rehabilitation funds. Can I use this money to help pay for my educational programme at GIA?
I have been selected for federal verification. What does this mean, and what do I next?
I have received a scholarship from an outside organisation. Can I use it towards my tuition for GIA?
What happens if I receive financial assistance and I do not complete my educational programme?
Will financial aid pay for all my tuition fees as well as my living expenses?
As a non-US citizen, how can I study at one of GIA's campuses in the US?
Can I change my status from a non-immigrant visa to the M-1 visa?
How do I apply for my M-1 Non-immigrant visa to study at GIA?
When is the I-20MN sent to me?
Is there a difference between what is taught on each GIA campus?
What is the deadline for enrolling in on-campus programmes?
Why does GIA no longer have campuses in Japan and Russia?
Programmes and Courses
Does GIA teach appraisal courses?
Is the Graduate Gemologist diploma the same, whether earned on campus or through Distance Education?
My employer has agreed to pay my tuition at GIA. How do they do this?
Where can I learn to cut diamonds?
Will GIA certify me as a gemmologist?
+1 800 421 7250
+1 760 603 4001
+1 800 366 8519
+1 212 944 5900
You might also like
Find a Retailer
Visit the campus shop
Quality Assurance Benchmarks
G&G Summer 2017 Edition